SECTION 08 39 19

WATERTIGHT CLOSURES

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 Copyright 2014 -  2025 ARCAT, Inc. - All rights reserved

PART 1    GENERAL
1.1	SECTION INCLUDES
A.	Provide watertight closure(s) factory assembled with frame and operating components in accordance with contract specifications and approved drawings.
1.	Removable flood barriers.
2.	Hinged flood barriers.
3.	Sliding flood barriers
4.	Automatically deploying flood barriers.
5.	Watertight and airtight doors.
6.	Air pressure resistant doors (BSL3 & BSL-4)
7.	Automatically deploying watertight roller curtain doors.
8.	Watertight hatches.
1.2	RELATED SECTIONS
A.	Section 05 50 00 - Metal Fabrications.
1.3	REFERENCES
A.	AISC "Specifications for Design, Fabrication, and Erection of Structural Steel for Buildings".
B.	American Iron and Steel Institute (AISI) CL 304, 316, 316L.
C.	The Aluminum Assoc. "Aluminum Design Manual".
D.	ASME Structural Welding Code Section IX. 
E.	ASTM A36, D2000.
F.	AWS Structural Welding Code D1, D1.2, D1.3, D1.6.
G.	FEMA Bulletin 3-93, #102 & #114.
1.4	SUBMITTALS
A.	Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.	Manufacturers Data: Submit installation and maintenance manuals for watertight closure.
C.	Shop Drawings: Submit shop drawings approved by licensed Professional Engineer for watertight closure including dimensional plans, elevations, sections, details for mountings/connections, and parts list.
D.	Calculations: Submit calculations approved by licensed Professional Engineer verifying the watertight closure's ability to withstand the design pressure loading.
E.	Quality Assurance Submittals: Submit test reports showing compliance with specified performance characteristics.
1.5	QUALITY ASSURANCE
A.	Manufacturer Qualifications: Manufacturer shall present evidence attesting to at least five years successful experience in the design and manufacture of similar closures.
B.	Welding: Welding shall be performed in accordance with the requirements of the applicable AWS or ASME standards.
C.	Product Quality Assurance:
1.	Perform shop operational test.
2.	Perform shop chalk test.
3.	Perform shop hose 
4.	Liquid Penetrant Test: Welds in the "potential" leak path shall be liquid penetrant inspected in accordance with Appendix VIII of Section VIII of ASME Code Div. 1.
5.	Hydrostatic Test: Provide hydrostatic test data certifying that the closure furnished, or a closure of similar design, has been satisfactorily tested to verify that it will withstand the designed hydrostatic pressure with no visible leakage.
6.	Air leakage Test: Inflate gaskets and confirm no loss of pressure over 4 hour time period.
1.6	PRE-SUBMITTAL MEETINGS
A.	Convene minimum two weeks prior to starting work of this section for critical applications.
1.7	DELIVERY, STORAGE, AND HANDLING
A.	Deliver and store products in manufacturer's unopened packaging bearing the brand name and manufacturer's identification until ready for installation.
B.	Handling: Handle materials to avoid damage.
1.8	PROJECT CONDITIONS
A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's recommended limits.
1.9	SEQUENCING
A.	Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.
1.10	WARRANTY
A.	Watertight closure shall operate satisfactorily and be free of defects in material and workmanship for a period of not less than one year from the date of delivery
PART 2    PRODUCTS
2.1	MANUFACTURERS
A.	Acceptable Manufacturer: Walz & Krenzer, Inc., which is located at:<BR />91 Willenbrock Rd., Unit B4<BR />Oxford, CT 06478<BR />Tel: 203-267-5712<BR />Fax: 203-267-5716<BR />Email: request info (sales@wkdoors.com);Web: http://www.floodbarriers.com | http://www.wkdoors.com 
B.	Substitutions: Not permitted.
C.	Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
2.2	REMOVABLE FLOOD BARRIERS
A.	Removable Lip Seal Gasket Flood Barriers:
1.	Model FP-LS as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames shall be angles for mounting on the exterior face of the wall surface, or as flatbars for mounting inside door jambs. Refer to drawings.
5)	Bottom frame is a 1/2 inch (13 mm) flatbar, which shall be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of flood barriers shall have small 2 inches (51 mm) radius.
7)	Frame: Mounting holes for expansion anchors 
8)	Frame: Masonry subframe with welded anchors for embedment in concrete.
9)	Two storage brackets per panel shall be provided.
10)	Flood barriers over 10 feet (3048 mm) in width and 6 feet (1829 mm) in height may require multiple panels, available in both side by side, and/or stacked configurations. Side by side multiple panel flood barriers are provided with removable braces (and without mullions). Refer to WK model FP-M and relevant drawings.
11)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Frame: ASTM A-36 steel.
3)	Frame: Aluminum.
4)	Frame: 304 stainless steel.
5)	Frame: 316 stainless steel.
6)	Latches: stainless steel sliding latch bolts.
7)	Gasket: Walz & Krenzer EPDM lip seal gasket, 60 duro with fully molded corners.
8)	Finish: Aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame shall be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
9)	Finish coat shall be epoxy paint.
10)	Grab Handle and Panel Stops: 6061-T6 aluminum.
11)	Storage brackets: ASTM A-36 steel.
B.	Removable Compression Gasket Flood Barrier:
1.	Model FP-C as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames shall be angles for mounting on the exterior face of the wall surface.
5)	Standard bottom sill is raised 1.5 inches (38 mm) from floor surface.
6)	Provide recessed sill option when flush sill is required.
7)	Provide recessed removable flush bottom sill when flush sill is required.
8)	Frame: Mounting holes for expansion anchors 
9)	Frame: Masonry subframe with welded anchors for embedment in Frame knife-edge shall be rounded and smooth to maximize sealing.
10)	Removable Ramp: Ramp shall be provided to be placed over the raised bottom sill for vehicular traffic or to prevent tripping hazard.
a)	Material: Aluminum 
b)	Material: Stainless steel.
11)	Two storage brackets per panel shall be provided.
12)	Dogs shall be designed to adjust gasket compression in the field. Gate size and design pressure direction shall determine the quantity and type of dog. 
13)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: Stainless steel plate and stiffeners.
4)	Frame: ASTM A-36 steel.
5)	Frame: Aluminum.
6)	Frame: 304 stainless steel.
7)	Frame: 316 stainless steel.
8)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners.
9)	Dogs/Drop bolts: stainless steel/bronze dogs or drop bolts. Utilize drop bolts for reduced maintenance and lower cost when operation is from outside only.
10)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
11)	Finish coat shall be epoxy paint.
C.	Removable Inflatable Gasket Flood Barrier:
1.	Model FP-I as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames are available as angles for mounting on the exterior face of the wall surface, or as flatbars for mounting inside door jambs. Refer to drawings.
5)	Bottom frame is a 1/2 inch (13 mm) flatbar, which can be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of flood barrier shall have a minimum 2 inches (52 mm) radius at frame.
7)	Air Source: Compressed air tank.
8)	Air Source: Portable hand pump.
9)	Air Source: Portable foot pump.
10)	Air Source: Shop air
11)	Air source & controls can be pre-piped onto barrier panel
12)	Push-button controls for activation of air source available
13)	Security cover on panel available to protect air source and controls when they are pre-piped and pre-installed on barrier panel.
14)	Frame: Mounting holes for expansion anchors 
15)	Frame: Masonry subframe with welded anchors for embedment in concrete.
16)	Multiple panel flood barriers with a center mullion. Refer to drawings.
17)	Sealing surfaces shall be finished to 63 micro inches to maximize sealing, uninterrupted by steps greater than 0.015 inch (0.38 mm), free of cracks, with finish lay parallel to seal.
18)	Two storage brackets per panel shall be provided.
19)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: Stainless steel plate and stiffeners.
4)	Frame: ASTM A-36 steel.
5)	Frame: Aluminum.
6)	Frame: 304 stainless steel.
7)	Frame: 316 stainless steel.
8)	Latches: stainless steel sliding latch bolts.
9)	Gasket: Single or dual EPDM inflatable gasket supplied with standard automotive style valve stem and 0-60 psi pressure gauge. Fabric reinforced inflatable gasket used for his pressure applications or large size barriers.
10)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
11)	Finish coat shall be epoxy paint.
12)	Grab Handle and Panel Stops: 6061-T6 aluminum (mild steel and stainless options are available).
13)	Storage brackets: ASTM A-36 steel.
D.	Removable Multi-Panel Lip Seal Flood Barrier:
1.	Model FP-M as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames are available as angles for mounting on the exterior face of the wall surface, or as flatbars for mounting inside door jambs. Refer to drawings.
5)	Bottom frame is a 1/2 inch (13 mm) flatbar, which can be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of flood barriers have small 2 inches (51 mm) radius.
7)	Frame: Mounting holes for expansion anchors 
8)	Frame: Masonry subframe with welded anchors for embedment in concrete.
9)	Two storage brackets per panel included.
10)	Flood barriers over 10 feet (3048 mm) in width and 6 feet (1829 mm) in height may require multiple panels, available in both side by side, and/or stacked configurations. Side by side multiple panel flood barriers are provided with removable braces (and without mullions). Stacked flood barriers (stacked on top of each other) may not require bracing.
11)	Square gasket corners are used at the junction of the center panels. Very slight leakage may occur at the square gasket corner. However, the leakage rate is well under the allowable FEMA leakage rate for the protected area.
12)	Removable braces are typically diagonal braces mounted from a flush embedded sub plate, located in front of the flood barriers and at the seam between the panels. Other bracing options are available if standard diagonal bracing is not compatible with site conditions.
13)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Frame: ASTM A-36 steel (options include aluminum and 304 or 316 stainless steel).
3)	Latches: stainless steel sliding latch bolts.
4)	Gasket: Walz & Krenzer EPDM lip seal gasket, 60 duro with fully molded corners.
5)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
6)	Finish coat shall be epoxy paint.
7)	Grab Handle and Panel Stops: 6061-T6 aluminum.
8)	Storage brackets: ASTM A-36 steel.
9)	Removable Support Brace: For side-by-side panels, diagonal brace(s) are mounted to the front of the panels, with one brace located at every seam between the panels. The diagonal brace attaches to a flush sub plate, embedded in the ground in front of the flood barrier. Other bracing options are available. Refer to drawings.
2.	Model FP-QW as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames are custom fabricated to attach to existing wall geometry.
5)	Floor shall be flat within 1/16 inch (1.5 mm) between the posts with a typical spacing of 10 feet (3048 mm) between posts.
6)	Depending on floor surface, a bottom frame may not be required. Bottom gasket designed to seal against floor surface. Refer to drawings.
7)	Bottom post frame shall be recessed into floor surface to achieve a flush sill. Depth of frame depends on the flood elevation. Refer to drawings.
8)	Corners of flood barriers have small 2 inches (51 mm) radius.
9)	Frame: Mounting holes for expansion anchors 
10)	Frame: Masonry subframe with welded anchors for embedment in concrete.
11)	Additional Requirements: 
b.	Material: 
1)	Panel: custom extruded 6061-T6 aluminum shape.
2)	Frame: ASTM A-36 steel.
3)	Frame: Aluminum.
4)	Frame: 304 stainless steel.
5)	Frame: 316 stainless steel.
6)	Posts: custom extruded 6061-T6 aluminum shape.
7)	Latches: stainless steel sliding latch bolts.
8)	Gasket: Walz & Krenzer EPDM gaskets. Custom shapes for posts, logs and frames.
9)	Storage Rack: Aluminum pallet.
10)	Storage Rack: Mild steel pallet.
2.3	FLOOD BARRIERS
A.	Hinged Lip Seal Gasket Flood Gate:
1.	Model FG-LS Hinged Lip Seal as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames are available as angles for mounting on the exterior face of the wall surface, or as flatbars for mounting inside door jambs. Refer to drawings.
5)	Bottom frame is a 1/2 inch (13 mm) flatbar, which can be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of flood gates have small 2 inches (51 mm) radius.
7)	Roller assembly shall be provided on gates wider than 4 feet (1219 mm), or for gates with flush bottom sills.
8)	Opening device for latching gate shall be provided.
9)	Frame: Mounting holes for expansion anchors 
10)	Frame: Masonry subframe with welded anchors for embedment in concrete.
11)	Dual panel hinged flood gates available with diagonal brace for support at center seam. Alternative bracing configurations are available. Refer to drawings.
12)	Additional requirements such as hydrodynamic loads, impact loads and breaking wave loads shall be added as required by the specific application.
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Frame: ASTM A-36 steel.
3)	Frame: Aluminum.
4)	Frame: 304 stainless steel.
5)	Frame: 316 stainless steel.
6)	Latches: stainless steel sliding latch bolts.
7)	Gasket: Walz & Krenzer EPDM lip seal gasket, 60 duro with fully molded corners.
8)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
9)	Finish coat shall be epoxy paint.
10)	Grab Handle and Panel Stops: 6061-T6 aluminum.
11)	Hinges: to include bronze oil-impregnated thrust bearing and stainless steel hinge pins.
B.	Hinged Compression Gasket Flood Gate:
1.	Model FG-C Compression as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames angles for mounting on the exterior face of the wall surface.
5)	Standard bottom sill is raised 1-1/2 inches (38 mm) from floor surface.
6)	Roller assembly shall be provided on gates wider than 6 feet (1829 mm).
7)	Frame: Mounting holes for expansion anchors 
8)	Frame: Masonry subframe with welded anchors for embedment in concrete.
9)	Dual panel hinged flood gates available for wider openings. Refer to drawings.
10)	Frame knife-edge shall be rounded and smooth to maximize sealing.
11)	Removable Ramp: Ramp shall be provided to be placed over the raised bottom sill for vehicular traffic or to prevent tripping hazard.
a)	Material: Aluminum 
b)	Material: Stainless steel.
12)	Dogs shall be designed to adjust gasket compression in the field. Gate size and design pressure direction shall determine the quantity and type of dog. 
13)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: ASTM A-36 steel.
3)	Panel: 304 stainless steel.
4)	Panel: 316 stainless steel.
5)	Frame: ASTM A-36 steel.
6)	Frame: Aluminum.
7)	Frame: 304 stainless steel.
8)	Frame: 316 stainless steel.
9)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners.
10)	Dogs/Drop Bolts: Stainless steel/bronze dogs or drop bolts. Provide drop bolts for reduced maintenance and lower cost where operation is from outside only.
11)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. Stainless steel abrasive cleaned.
12)	Finish coat shall be epoxy paint.
13)	Grab Handle and Panel Stops: 6061-T6 aluminum.
14)	Hinges: to include bronze oil-impregnated thrust bearing and stainless steel hinge pins.
C.	Hinged Inflatable Gasket Flood Gate:
1.	Model FG-I Side Hinged as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames are available as angles for mounting on the exterior face of the wall surface, or as flatbars for mounting inside door jambs. Refer to drawings.
5)	Bottom frame is a 1/2 inch (13 mm) flatbar, which can be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of flood gate to have a minimum 2 inches (52 mm) radius at frame.
7)	Roller assembly is provided on gates wider than 6 feet (1829 mm).
8)	Air Source: Compressed air tank.
9)	Air Source: Hand pump.
10)	Air Source: Foot pump.
11)	Air Source: Shop air
12)	Air source & controls can be pre-piped and installed on barrier panel
13)	Push-button controls for activation of air source available
14)	Security cover on panel available to protect air source and controls when they are pre-piped and pre-installed on barrier panel
15)	Frame: Mounting holes for expansion anchors 
16)	Frame: Masonry subframe with welded anchors for embedment in concrete.
17)	Dual panel hinged flood gates available with a center mullion. Refer to drawings.
18)	Sealing surfaces shall be finished to 63 micro inches to maximize sealing, uninterrupted by steps greater than 0.015 inch (0.38 mm), free of cracks, with finish lay parallel to seal.
19)	Gate size and design pressure direction shall determine the quantity and type of latches.
20)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: Stainless steel plate and stiffeners.
4)	Frame: ASTM A-36 steel.
5)	Frame: Aluminum.
6)	Frame: 304 stainless steel.
7)	Frame: 316 stainless steel.
8)	Latches: Stainless steel sliding latch bolts.
9)	Gasket: Single or dual EPDM inflatable gasket supplied with standard automotive style valve stem and 0-60 psi pressure gauge. Fabric reinforced inflatable gasket used for this pressure applications or large size gates.
10)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. Stainless steel abrasive cleaned.
11)	Finish coat shall be epoxy paint.
12)	Grab Handle and Panel Stops: 6061-T6 aluminum.
13)	Grab Handle and Panel Stops: Mild steel. 
14)	Grab Handle and Panel Stops: Stainless steel.
15)	Hinges: Provide bronze oil-impregnated thrust bearing and stainless steel hinge pins.
D.	Flip Up Flood Gate:
1.	Model FG-BH Bottom Hinged (Flip-Up) as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	When flood gate is in the lowered position, it becomes part of the ground or road surface. Refer to drawings.
5)	Diamond tread plates or non-skid grooves shall be cut for top facing plate. 
6)	Side frames are angles for mounting to existing exterior face of the wall surface or flatbars for mounting inside door jambs. Refer to drawings.
7)	Frame: Mounting holes for expansion anchors 
8)	Frame: Masonry subframe with welded anchors for embedment in Frame knife-edge shall be rounded and smooth to maximize sealing.
9)	Bottom trough in which flood gate rests in shall be supplied in the form of a pan with drain connections supplied.
10)	For flood gates located in roadways, live loads per AASHTO shall be scheduled on the drawings.
11)	Flood gate shall be designed to withstand flood waters up to its full height with allowable stresses in accordance with the Aluminum Association "Aluminum Design Manual" and AISC.
12)	For large and/or heavy floodgates: mechanical assist shall be required. 
13)	Mechanical Assist: Manual winch.
14)	Mechanical Assist: Power winch.
15)	Mechanical Assist: Counterweight.
16)	Mechanical Assist: Hydraulic lift.
17)	For inflatable gasket gate, sealing surfaced shall be finished to 63 micro inches to maximize sealing, uninterrupted by steps greater than .015 inch (0.38 mm), free of cracks, with finish lay parallel to seal.
18)	Air Source: Compressed air tank.
19)	Air Source: Hand pump.
20)	Air Source: Foot pump.
21)	Gate size and design pressure direction shall determine the quantity and type of dogs.
22)	Additional Requirements: 
b.	Material: 
1)	Panel: 6061-T6 aluminum diamond plate
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: Stainless steel plate and stiffeners.
4)	Frame: ASTM A-36 steel.
5)	Frame: Aluminum.
6)	Frame: 304 stainless steel.
7)	Frame: 316 stainless steel.
8)	Gasket: WK neoprene lip seal gasket.
9)	Gasket: WK star gasket.
10)	Gasket: EPDM inflatable gasket
11)	Gasket: ASTM D2000 GR DE 25 duro neoprene gasket.
12)	Dogs: stainless steel or bronze dogs are used depending on loads.
13)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
14)	Finish coat shall be epoxy paint.
15)	Hinges: Bronze oil-impregnated thrust bearing and stainless steel hinge pins.
E.	Sliding Flood Barriers:
1.	Model FG-HS Horizontal Sliding as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames shall be provided as angles for mounting on the exterior face of the wall surface. Refer to drawings.
5)	For horizontal sliding barriers: bottom frame supplied as a trough with a track system. On top of trough is a hinged cover plate. When lowered, the cover plate provides a flush surface with ground level. 
a)	For large gates, winch assemblies with wire rope shall be supplied to aid in watertight barrier operation.
6)	For vertical sliding barriers: bottom frame is a flatbar that shall be mounted flush with the ground level. Winch with wire top shall be supplied for operating vertical sliding barriers.
7)	Inflatable gaskets shall be used in lieu of compression gaskets.
8)	Frame: Mounting holes for expansion anchors 
9)	Frame: Masonry subframe with welded anchors for embedment in concrete.
10)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: ASTM A-36 steel.
3)	Panel: 304 stainless steel.
4)	Panel: 316 stainless steel.
5)	Frame: ASTM A-36 steel.
6)	Frame: Aluminum.
7)	Frame: 304 stainless steel.
8)	Frame: 316 stainless steel.
9)	Latches: Stainless steel sliding latch bolts.
10)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners. In pressure exceeding 20 feet (6096 mm) design pressure, 40 duro gasket shall be used. 
11)	Guide Rails: ASTM A-36 steel.
12)	Guide Rails: Aluminum.
13)	Guide Rails: 304 stainless steel.
14)	Guide Rails: 316 stainless steel.
15)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
16)	Finish coat shall be epoxy paint.
17)	Grab Handle and Panel Stops: 6061-T6 aluminum.
2.	Model FG-VS Vertical Sliding as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames shall be provided as angles for mounting on the exterior face of the wall surface.
5)	Bottom frame is a 1/2 inch (13 mm) flatbar, which can be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of flood barrier have small 2 inches (51 mm) radius.
7)	Guide rails extend the full height of the barrier travel.
8)	Cable assembly: minimum 5:1 factor of safety on breaking strength.
9)	Manual winch: self-locking, worm gear drive.
10)	Barrier secured in raised position (fail safe) by secondary latch.
11)	Frame: Mounting holes for expansion anchors 
12)	Frame: Masonry subframe with welded anchors for embedment in concrete.
13)	Additional Requirements: 
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Frame: ASTM A-36 steel.
3)	Frame: Aluminum.
4)	Frame: 304 stainless steel.
5)	Frame: 316 stainless steel.
6)	Latches: Stainless steel sliding latch bolts.
7)	Gasket: Walz & Krenzer EPDM lip seal gasket, 60 duro with fully molded corners.
8)	Guide Rails: ASTM A-36 steel.
9)	Guide Rails: Aluminum.
10)	Guide Rails: 304 stainless steel.
11)	Guide Rails: 316 stainless steel.
12)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
13)	Finish coat shall be epoxy paint.
14)	Winch - manual hand winch with split drum for two cables
15)	Winch - electric winch with split drum for two cables
16)	Cable assembly: stainless steel wire rope.
17)	Grab Handle and Panel Stops: 6061-T6 aluminum.
F.	Auto Rising Flood Barriers:
1.	Model FG-AR as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: Gate designed to take a seating pressure to the full height of the gate.
2)	Sealing: provide lip seal gaskets for watertight seal on bottom and sides.
3)	When flood gate is in the lowered position, it shall become part of the ground or road surface.
4)	Non-skid coatings shall be used for top facing plate.
5)	Gate shall automatically close and seal by flood water filling the trough. The gate shall fully close before water level in trough reaches grade.
6)	Automatic gate actuation by flood water shall be provided with buoyant closed cell foam and stainless steel gas springs.
7)	Side frames shall be angles for mounting to existing exterior face of the wall surface or flatbars for mounting inside door jambs.
8)	Frame: Mounting holes for expansion anchors 
9)	Frame: Masonry subframe with welded anchors for embedment in concrete.
10)	Bottom trough in which flood gate rests shall have perimeter edge anchors and cross beams to support vehicle and pedestrian loads.
11)	For flood gates located in roadways, live loads per AASHTO classifications shall be scheduled. Refer to drawings..
12)	Flood gate shall be designed to withstand flood waters up to its full height with allowable stresses in accordance with the Aluminum Association "Aluminum Design Manual" and AISC.
13)	For large and/or heavy floodgates: mechanical assist is required. 
a)	Provide manual winches where scheduled.
b)	Provide powered winches where scheduled.
14)	Additional Requirements: 
b.	Material: 
1)	Panel: 6061-T6 aluminum plate (diamond tread can be provided as an option for some size barriers).
2)	Frame: ASTM A-36 steel.
3)	Frame: Aluminum.
4)	Frame: 304 stainless steel.
5)	Frame: 316 stainless steel.
6)	Gasket: WK EPDM lip seal gasket.
7)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
8)	Finish coat shall be epoxy paint.
9)	Hinges: Bronze oil-impregnated thrust bearing and stainless steel hinge pins.
10)	Gas Springs shall be stainless steel.
11)	Buoyant foam shall be rigid, extruded, closed cell polystyrene foam.
2.4	WATERTIGHT AND AIRTIGHT DOORS
A.	Compression Gasket Watertight Door:
1.	Model WT-FD-C Quick-Acting Clean Room Door as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	One side of door panel to be flush for ease of cleaning.
2)	Design Pressure: # (in feet of water). 
3)	Operation: Seating (pushing gate closed).
4)	Operation: Unseating direction (pushing gate open).
5)	Standard bottom sill is raised 1-1/2 inches (38 mm) from floor surface.
6)	Frame: Mounting holes for expansion anchors 
7)	Frame: Masonry subframe with welded anchors for embedment in concrete.
8)	Frame knife-edge shall be rounded and smooth to maximize sealing.
9)	Removable Ramp: Ramp shall be provided to be placed over the raised bottom sill for vehicular traffic or to prevent tripping hazard.
10)	Provide power operation.
11)	Provide viewing window.
12)	Provide lock.
13)	Provide remote indication/control/monitoring.
14)	Door size and design pressure direction shall determine the quantity and type of dog. Dogs shall be designed to adjust gasket compression in the field.
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: 304 Stainless steel plate and stiffeners.
4)	Panel: 316 Stainless steel plate and stiffeners.
5)	Frame: ASTM A-36 steel.
6)	Frame: Aluminum.
7)	Frame: 304 stainless steel.
8)	Frame: 316 stainless steel.
9)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners. In pressure exceeding 20 feet (6096 mm) design pressure, 40 duro gasket shall be provided. 
10)	Gasket: Custom o-ring for high pressure applications
11)	Operating Mechanism: bronze or stainless steel dogs and toggles, stainless steel link bars, stainless steel gears.
12)	Bushings and bearings for dogs: bronze oil impregnated thrust bearings.
13)	Finish: Aluminum panel painted with INSL-X CheckRust acrylic paint. Frame blast clean per SSPC-SP7 and primed with inorganic zinc primer. 
14)	Hinges: Bronze oil-impregnated thrust bearing and stainless steel hinge pins.
2.	Model WT-FD-QA Quick-Acting Door as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Quick-acting handwheel or lever provided for frequent access.
2)	Design Pressure: # (in feet of water). 
3)	Operation: Seating (pushing door closed).
4)	Operation: Unseating direction (pushing door open).
5)	Side frames shall be angles for mounting on the exterior face of the wall surface.
6)	Standard bottom sill is raised 1-1/2 inches (38 mm) from floor surface.
7)	Frame: Mounting holes for expansion anchors 
8)	Frame: Masonry subframe with welded anchors for embedment in concrete.
9)	Frame: Angle for welding to existing embedded steel frame
10)	Frame knife-edge shall be rounded and smooth to maximize sealing.
11)	Removable Ramp: Ramp shall be provided to be placed over the raised bottom sill for vehicular traffic or to prevent tripping hazard.
12)	Provide power operation.
13)	Provide viewing window.
14)	Provide lock.
15)	Provide remote indication/control/monitoring.
16)	Door size and design pressure direction shall determine the quantity and type of dog. Dogs are designed to adjust gasket compression in the field.
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: 304 Stainless steel plate and stiffeners.
4)	Panel: 316 Stainless steel plate and stiffeners.
5)	Frame: ASTM A-36 steel.
6)	Frame: Aluminum.
7)	Frame: 304 stainless steel.
8)	Frame: 316 stainless steel.
9)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners. In pressure exceeding 20 feet (6096 mm) design pressure, 40 duro gasket shall be provided. 
10)	Gasket: WK custom O-ring available for high pressure applications
11)	Operating Mechanism: bronze or stainless steel dogs and toggles, stainless steel link bars, stainless steel gears.
12)	Bushings and bearings for dogs: bronze oil impregnated thrust bearings.
13)	Finish: Aluminum panel painted with INSL-X CheckRust acrylic paint. Frame blast clean per SSPC-SP7 and primed with inorganic zinc primer. 
14)	Hinges: to include bronze oil-impregnated thrust bearing and stainless steel hinge pins.
3.	Model WT-FD-I Individually Dogged Door as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing door closed).
3)	Operation: Unseating direction (pushing door open).
4)	Side frames shall be angles for mounting on the exterior face of the wall surface
5)	Standard bottom sill is raised 1-1/2 inches (38 mm) from floor surface.
6)	Frame: Mounting holes for expansion anchors 
7)	Frame: Masonry subframe with welded anchors for embedment in concrete.
8)	Frame: Angle frame for welding to existing embedded steel frame.
9)	Frame knife-edge shall be rounded and smooth to maximize sealing.
10)	Removable Ramp: Ramp shall be provided to be placed over the raised bottom sill for vehicular traffic or to prevent tripping hazard.
11)	Door size and design pressure direction shall determine the quantity and type of dog. Dogs are designed to adjust gasket compression in the field.
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: 304 Stainless steel plate and stiffeners.
4)	Panel: 316 Stainless steel plate and stiffeners.
5)	Frame: ASTM A-36 steel.
6)	Frame: Aluminum.
7)	Frame: 304 stainless steel.
8)	Frame: 316 stainless steel.
9)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners. In pressure exceeding 20 feet (6096 mm) design pressure, 40 duro gasket shall be provided. 
10)	Gasket: custom O-ring for high pressure applications
11)	Dogs: Stainless steel dog assemblies with bronze wedges.
12)	Dog Bearings And Bushings: Oil-impregnated bronze.
13)	Finish: Aluminum panel painted with INSL-X CheckRust acrylic paint. Frame blast clean per SSPC-SP7 and primed with inorganic zinc primer. 
14)	Grab Handle and Panel Stops: 6061-T6 aluminum.
15)	Hinges: Bronze oil-impregnated thrust bearing and stainless steel hinge pins.
B.	Inflatable Gasket Watertight Door:
1.	Model WT-FD-ID as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing door closed).
3)	Operation: Unseating direction (pushing door open).
4)	Side frames shall be available as angles for mounting on the exterior face of the wall surface, or as flatbars for mounting inside door jambs. Refer to drawings.
5)	Bottom frame shall be 1/2 inch (13 mm) flatbar, which can be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of watertight/airtight door to have a minimum 2 inches (51 mm) radius at frame.
7)	Air Source: Compressed air tank.
8)	Air Source: Hand pump.
9)	Air Source: Foot pump.
10)	Frame: Mounting holes for expansion anchors 
11)	Frame: Masonry subframe with welded anchors for embedment in concrete
12)	Frame: Angle for welding to existing embedded frame
13)	Sealing surfaces shall be finished to 63 micro inches to maximize sealing, uninterrupted by steps greater than 0.015 inch (0.38 mm), free of cracks, with finish lay parallel to seal.
14)	Provide power operation.
15)	Provide viewing window.
16)	Provide lock.
17)	Provide remote indication/control/monitoring.
18)	Door size and design pressure direction shall determine the quantity and type of latches.
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: Mild steel plate and stiffeners.
3)	Panel: 304 Stainless steel plate and stiffeners.
4)	Panel: 316 Stainless steel plate and stiffeners.
5)	Frame: ASTM A-36 steel.
6)	Frame: Aluminum.
7)	Frame: 304 stainless steel.
8)	Frame: 316 stainless steel.
9)	Latches: Stainless steel sliding latch bolts
10)	Gasket: Single or dual EPDM or neoprene inflatable gasket supplied with standard automotive style valve stem and 0-60 psi pressure gauge. Fabric reinforced inflatable gasket used for higher pressure applications or large size doors.
11)	Finish: Aluminum panel painted with INSL-X CheckRust acrylic paint. Frame blast clean per SSPC-SP7 and primed with inorganic zinc primer. 
12)	Grab Handle and Panel Stops: 6061-T6 aluminum.
13)	Hinges: Bronze oil-impregnated thrust bearing and stainless steel hinge pins.
2.	Model AT-BIO as manufactured by Walz & Krenzer, Inc. 
a.	Design: 
1)	Design Pressure: # (in inches of water). 
2)	Operation: Seating (pushing door closed).
3)	Operation: Unseating direction (pushing door open).
4)	Frames custom designed for specific mounting situation to blend with surrounding structure. Typically mounted inside jamb to minimize visual impact. 
5)	Bottom frame shall be 1/2 inch (13 mm) flatbar, which can be recessed 1/2 inch (13 mm) into floor surface to achieve a flush bottom sill. Refer to drawings.
6)	Corners of watertight/airtight door to have a minimum 2 inches (51 mm) radius at frame.
7)	Air Source: Compressed air tank.
8)	Air Source: Hand pump.
9)	Air Source: Foot pump.
10)	Air Source: Shop air
11)	Frame: Mounting holes for expansion anchors 
12)	Frame: Masonry subframe with welded anchors for embedment in concrete
13)	Frame: Angle for welding to existing embedded frame
14)	Sealing surfaces shall be finished to 63 micro inches to maximize sealing, uninterrupted by steps greater than 0.015 inch (0.38 mm), free of cracks, with finish lay parallel to seal.
15)	Provide power operation.
16)	Provide viewing window.
17)	Provide electric lock to hold door in closed position.
18)	Provide integrated control lights and access switches mounted within frame.
19)	Provide remote indication/control/monitoring.
20)	Door size and design pressure direction shall determine the quantity and type of latches.
b.	Material: 
1)	Panel: 316 stainless steel (mild steel & 304 stainless available)
2)	Frame: 316 stainless steel (mild steel & 304 stainless steel available)
3)	Gasket: Dual EPDM inflatable gasket supplied with standard automotive style valve stem and 0-60 psi pressure gauge. Fabric reinforced inflatable gasket used for higher pressure applications or large size doors.
4)	Finish: No. 4 polished finish is standard. Options include painting and powder coating.
5)	Hinges: WK custom 316 stainless steel
C.	Sliding Watertight Door:
1.	Model WT-S as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Side frames shall be angles for mounting on the exterior face of the wall surface.
5)	Bottom frame supplied as a trough with a track system. On top of trough is a hinged cover plate. When lowered, the cover plate provides a flush surface with ground level.
6)	For large doors, provide winch assemblies with wire rope to aid in watertight door operation.
7)	Provide Inflatable gaskets in lieu of compression gaskets.
8)	Frame: Mounting holes for expansion anchors 
9)	Frame: Masonry subframe with welded anchors for embedment in concrete.
b.	Material: 
1)	Panel: 5051-H32 aluminum plate with 6061-T6 aluminum stiffeners.
2)	Panel: ASTM A-36 steel.
3)	Panel: 304 stainless steel.
4)	Panel: 316 stainless steel.
5)	Frame: ASTM A-36 steel.
6)	Frame: Aluminum.
7)	Frame: 304 stainless steel.
8)	Frame: 316 stainless steel.
9)	Latches: Stainless steel sliding latch bolts.
10)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro. In pressure exceeding 20 feet (6096 mm) design pressure, 40 duro gasket shall be provided. 
11)	Gasket: Gasket: Single or dual EPDM or neoprene inflatable gasket supplied with standard automotive style valve stem and 0-60 psi pressure gauge. Fabric reinforced inflatable gasket used for higher pressure applications or large size doors.
12)	Guide Rails: ASTM A-36 steel.
13)	Guide Rails: Aluminum.
14)	Guide Rails: 304 stainless steel.
15)	Guide Rails: 316 stainless steel.
16)	Finish: aluminum panel painted with INSL-X CheckRust acrylic paint. Mild steel frame to be blast to near white metal per SSPC-SP- 7 and primed with one coat of inorganic zinc primer. 
17)	Finish coat shall be epoxy paint.
18)	Grab Handle and Panel Stops: 6061-T6 aluminum.
D.	Auto-Seal Roller Curtain Door:
1.	Model: WT-R as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing gate closed).
3)	Operation: Unseating direction (pushing gate open).
4)	Roller curtain door shall be designed to be used as an everyday roller curtain door.
5)	Mounting Configurations: On outside face of building, inside the jambs and on the inside face of building. Refer to drawings.
6)	Bottom frame shall be stiffened sheet metal shape, designed to be recessed into floor surface to achieve a flush bottom sill.
7)	Roller curtain door shall be fully motorized and actuated by pressing a button on a wired control station. 
8)	Provide remote control actuation.
9)	Gate will automatically close when the float switch detects water (can be disabled).
10)	Infrared sensor provided to detect movement through door opening during lowering of door. If triggered, door will fully open and automatically close after a pre-determined period.
11)	UPS shall be provided for operation during power loss.
12)	Power requirements: 120 VAC, 30 A circuit.
13)	Frame(s) shall have mounting holes for expansion.
b.	Materials: 
1)	Panel: Custom extruded aluminum shape.
2)	Frame: Stainless steel.
3)	Support Chassis: ASTM A-36 steel.
4)	Gasket: EPDM foam gasket.
5)	Finish: Extruded aluminum mill finish.
2.5	WATERTIGHT HATCHES
A.	Flush Watertight Hatch:
1.	Model WTH-F as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Design Loading: H-20 or HS-20 vehicular loading
3)	Operation: Seating (pushing hatch closed).
4)	Operation: Unseating direction (pushing hatch open).
5)	Flush hatches shall be operable from one or both sides via individual dogs or from bottom side using a quick-acting handwheel. Refer to drawings.
6)	Shape: Refer to drawings.
7)	Frame: Provided for bolt-on or weld-on installation for existing openings, or with masonry subframes for embedding in new pour concrete. Refer to drawings 
8)	Hatch size and design pressure direction shall determine the quantity and type of dog. Dogs shall be designed to adjust gasket compression in the field.
b.	Materials: 
1)	Panel and Frame: ASTM A-36 steel.
2)	Panel and Frame: Aluminum.
3)	Panel and Frame: 304 stainless steel.
4)	Panel and Frame: 316 stainless steel.
5)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners. 
6)	Gasket: ASTM D2000 GR DE neoprene gasket, 40 duro with fully molded corners for pressures exceeding 10 psi.
7)	Gasket: O-rings for high pressure applications
8)	Securing Dogs: Stainless steel dog assemblies with bronze wedges. Dogs on flush side of hatch shall be recessed, and operable via T- wrench. For higher pressure applications, high strength bronze dogs shall be used.
9)	Hinges: Bronze oil-impregnated thrust bearing and stainless steel hinge pins.
10)	Recessed grab handles shall be provided for lifting hatch.
11)	T-wrench provided to operate flush dogs on top side of hatch
12)	Finish: mild steel blasted to near white metal per SSPC-SP-10 and primed with one coat of inorganic zinc primer. 
13)	Finish coat shall be epoxy paint.
14)	Knife-edge on frame to be ground to a 3/32 inches (2.4 mm) radius with surface roughness not to exceed 125 micro inches.
15)	Provide spring balancing.
16)	Provide counter-balancing.
17)	Provide panic bar operation from bottom side.
18)	Provide hold-open braces.
19)	Provide remote operation/indication.
B.	Raised Watertight Hatch:
1.	Model WTH-R as manufactured by Walz & Krenzer, Inc.
a.	Design: 
1)	Design Pressure: # (in feet of water). 
2)	Operation: Seating (pushing hatch closed).
3)	Operation: Unseating direction (pushing hatch open).
4)	Raised hatches can be operable from one or both sides via individual dogs or drop bolts for infrequent use. Provide Quick-acting handwheels for hatches that are used frequently. Refer to drawings.
5)	Shape: Refer to drawings.
6)	Frame: provided for bolt-on or weld-on installation for existing openings, or with masonry subframes for embedding in new pour concrete. Refer to drawings.
7)	Knife-edge on frame to be ground to a 3/32 inches (2.4 mm) radius with surface roughness not to exceed 125 micro inches.
8)	Hatch size and design pressure direction shall determine the quantity and type of dog. Dogs shall be designed to adjust gasket compression in the field.
b.	Material: 
1)	Panel and Frame: ASTM A-36 steel.
2)	Panel and Frame: Aluminum.
3)	Panel and Frame: 304 stainless steel.
4)	Panel and Frame: 316 stainless steel.
5)	Gasket: ASTM D2000 GR DE neoprene gasket, 25 duro with fully molded corners. 
6)	Gasket: ASTM D2000 GR DE neoprene gasket, 40 duro with fully molded corners for pressures exceeding 10 psi
7)	Gasket: Custom WK O-ring for high pressure applications
8)	Securing Dogs: Stainless steel dog assemblies with bronze wedges. Dogs on flush side of hatch shall be recessed, and operable via T- wrench. For higher pressure applications, high strength bronze dogs shall be used.
9)	Hinges: Bronze oil-impregnated thrust bearing and stainless steel hinge pins.
10)	Recessed grab handles shall be included for lifting hatch.
11)	Finish: Mild steel blasted to near white metal per SSPC-SP-10 and primed with one coat of inorganic zinc primer. 
12)	Finish coat shall be epoxy paint.
13)	Options include spring balancing, panic bar operation from below, hold-open braces, and remote operation/indication
2.6	FABRICATION
A.	The finished product shall be rigid, neat in appearance, and free from all defects, warps, and buckles. All exposed joints and corners shall be well rounded.
B.	The panel and frame shall be flat within 1/8 inch (3 mm) with a maximum deviation of 1/16 inch (1.5 mm) in any 6 feet (1829 mm) length.
C.	Welding shall be performed in accordance with the requirements of the applicable AWS or ASME standards.
D.	Butt welds in frame to be full penetration welds.
PART 3    EXECUTION
3.1	EXAMINATION
A.	Do not begin installation until substrates have been properly prepared.
B.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2	PREPARATION
A.	Clean surfaces thoroughly prior to installation.
B.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
3.3	INSTALLATION
A.	Install watertight closure in accordance with manufacturer's instructions and approved shop drawings.
B.	After installation, perform field operational and chalk test per manufacturer's instructions to verify seal.
C.	Finish paint (if applicable) after installation.
3.4	PROTECTION
A.	Protect installed products until completion of project.
B.	Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION