SECTION 05 51 33

METAL LADDERS - ALUMINUM

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PART 1    GENERAL
1.1	SECTION INCLUDES
A.	Vertical Aluminum Access Ladders: Fixed and wall mounted.
1.	Light duty, hatch access ladders.
2.	Heavy duty, hatch access ladders.
3.	Heavy duty, roof over rail extension ladders.
4.	Heavy duty, return to rear of parapet ladders.
5.	Heavy duty with platform and return to rear of parapet ladders.
B.	Fixed, inclined, aluminum, ladders.
1.	Ship ladder with handrail.
2.	Ship ladder with roof hatch access.
3.	Ship ladder with platform.
4.	Folding mezzanine access ship ladder.
5.	Ship ladder with cross over access.
6.	Counterbalanced swing down ladder.
C.	Fixed, wall mounted, vertical, caged aluminum ladders.
1.	Roof hatch rail extension ladder.
2.	Roof over rail extension ladder.
3.	Return to rear of parapet ladder.
4.	Ladder with platform and return to rear of parapet.
5.	Ladder with intermediate platforms and roof over rail.
1.2	RELATED SECTIONS
A.	Section 05 12 13 - Architecturally-Exposed Structural Steel Framing.
B.	Section 05 55 00 - Metal Stair Treads and Nosings.
C.	Section 06 10 00 - Rough Carpentry.
D.	Section 07 42 00 - Wall Panels.
E.	Section 07 72 50 - Roofing Fasteners*.
F.	Section 07 72 26 - Ridge Vents.
1.3	REFERENCES
A.	American National Standards Institute (ANSI):
1.	ANSI A14.3 - Ladders, Fixed, Safety Requirements.
B.	American Society for Testing and Materials (ASTM) Publications:
1.	ASTM B209 - Aluminum and Aluminum-Alloy Sheet and Plate.
2.	ASTM B221 - Aluminum-Alloy Extruded Bar, Rod, Wire, Shape, and Tube.
C.	Occupational Safety and Health Administration of the Unites States
1.	OHSA 1910.23: Fixed Ladders
2.	OSHA 1910.28: Duty to have fall protection and falling object protection.
1.4	SUBMITTALS
A.	Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.	Product Data: For access ladders and accessories.
1.	Manufacturer's data sheets on each product to be used.
2.	Preparation instructions and recommendations.
3.	Storage and handling requirements and recommendations.
4.	Typical installation methods.
C.	Shop Drawings: Include details of materials, construction, and finish. Include relationship with adjacent construction. 
1.5	QUALITY ASSURANCE
A.	Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with a minimum of five years documented experience.
B.	Installer Qualifications: Company specializing in performing Work of this section with minimum two years documented experience with projects of similar scope and complexity.
C.	Source Limitations: Provide each type of product from a single manufacturing source to ensure uniformity.
1.6	PRE-INSTALLATION CONFERENCE
A.	Convene a conference approximately two weeks before scheduled commencement of the Work. Attendees shall include Architect, Contractor and trades involved. Agenda shall include schedule, responsibilities, critical path items and approvals.
1.7	DELIVERY, STORAGE, AND HANDLING
A.	Store and handle in strict compliance with manufacturer's written instructions and recommendations.
B.	Protect from damage due to weather, excessive temperature, and construction operations.
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	WARRANTY
A.	Manufacturer's standard limited warranty unless indicated otherwise.
PART 2    PRODUCTS
2.1	MANUFACTURERS
A.	Acceptable Manufacturer: UPNOVR, Inc., which is located at:<BR />P. O. Box 199, 31 Pulpit Rock Rd.<BR />Pelham, NH 03076<BR />Tel: 603-625-8639<BR />Email: request info (constprod@upnovr.com);Web: http://upnovr.com 
B.	Substitutions: Not permitted.
C.	Requests for substitutions will be considered in accordance with the provisions of Section 01 60 00 - Product Requirements.
2.2	VERTICAL ALUMINUM ACCESS LADDERS
A.	Performance and Design Requirements:
1.	Access ladders shall be designed and installed to comply with ANSI A14.3. and OSHA 1910.23 minimum standards.
B.	Material:
1.	Extruded Aluminum: ASTM B221, Alloy 6061 Temper T-6, non-spark.
2.	Sheet Aluminum: ASTM B209 6061 Temper T-6.
3.	Finish: Mill finished aluminum.
C.	Fabrication:
1.	Field verify ladder dimensions prior to fabrication.
2.	Fabricate designs indicated on Drawings and to meet performance requirements as specified.
3.	Ladder rungs shall be welded. Ladders longer than 15 ft (4.572 m) will be shipped in sections.
D.	Basis of Design: Light Duty Hatch Access Ladder. Model No. U-100 as manufactured by UPNOVR, Inc.
1.	Type: Fixed. 
2.	Type: Wall Mounted.
3.	Nominal Height: 10 ft (3.048 m) maximum.
4.	Nominal Height: ___ ft (___ mm).
5.	Nominal Height: As indicated on Drawings.
6.	Side Rails (Width x Depth): 1-3/4 x 1-1/4 inches (44 x 32 mm) channels.
a.	Wall Thickness: 0.125 inch (3.17 mm).
7.	Rungs: Serrated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions (Width x Depth): 1.03 x 1.442 inch (26 x 37 mm.080) channels.
1)	Wall Thickness: 0.080 inch (2.03 mm).
b.	Rung Length: 18 inches (457 mm).
c.	Rung Length: 24 inches (610 mm).
d.	Rung Length: ___ inches (___ mm).
8.	Construction: Attach rungs in centerline of side rails by welding.
E.	Basis of Design: Heavy Duty Hatch Access Ladder. Model No. U-200 as manufactured by UPNOVR, Inc.
1.	Type: Fixed. 
2.	Type: Wall Mounted.
3.	Nominal Height: ___ ft (___mm).
4.	Nominal Height: As indicated on Drawings.
5.	Side Rails (Width x Depth): 1-3/4 x 3 inch (44 x 76 mm) tubes.
a.	Wall Thickness: 0.125 inch (3.17 mm).
6.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions (Width x Depth): 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.57 mm).
b.	Rung Length: 18 inches (457 mm).
c.	Rung Length: 24 inches (610 mm).
d.	Rung Length: ___ inches (___ mm).
7.	Construction: Attach rungs in centerline of side rails by welding.
F.	Basis of Design: Heavy duty, roof over rail extension ladder; Model No. U-201 as manufactured by UPNOVR, Inc.
1.	Type: Fixed. 
2.	Type: Wall Mounted.
3.	Nominal Height: ___ ft (___mm).
4.	Nominal Height: As indicated on Drawings.
5.	Side Rails (Width x Depth): 1-3/4 x 3 inch (44 x 76 mm) tubes.
a.	Wall Thickness: 0.125 inch (3.17 mm).
b.	Extend rails 42 inches (1067 mm) above roof line or parapet.
6.	Extension: At top of side rails provide a 19 inch (483 mm) extension. 
a.	Extension is 28 inches (711 mm) high, constructed from 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces.
7.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions: 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.57 mm).
b.	Rung Length: 18 inches (457 mm).
c.	Rung Length: 24 inches (610 mm).
d.	Rung Length: ___ inches (___ mm).
8.	Construction: Attach rungs in centerline of side rails by welding.
G.	Basis of Design: Heavy Duty, Return to Rear of Parapet Ladder; Model No. U-202 as manufactured by UPNOVR, Inc.
1.	Type: Fixed. 
2.	Type: Wall Mounted.
3.	Nominal Height: ___ ft (___mm).
4.	Nominal Height: As indicated on Drawings.
5.	Cross Over Span: ___ inches (___ mm).
6.	Cross Over Span: As indicated on Drawings.
7.	Side Rails (Width x Depth): 1-3/4 x 3 inch (44 x 76 mm) tubes.
a.	Wall Thickness: 0.125 inch (3.17 mm).
b.	Extend rails 42 inches (1067 mm) above the parapet. Provide rails on opposite side mounted to rear of parapet and extending 42 inches (1067 mm) above parapet and below parapet to roof line.
8.	Grab bars: Connect front and rear side rails with 4 pairs of 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces.
9.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions: 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.57 mm).
b.	Rung Length: 24 inches (610 mm).
10.	Construction: Attach rungs in centerline of side rails by welding.
H.	Basis of Design: Fixed heavy duty with platform and return to rear of parapet ladder; Model No. U-203 as manufactured by UPNOVR, Inc.
1.	Type: Fixed. 
2.	Type: Wall Mounted.
3.	Nominal Height: ___ ft (___mm).
4.	Nominal Height: As indicated on Drawings.
5.	Cross Over Span: ___ inches (___ mm).
6.	Cross Over Span: As indicated on Drawings.
7.	Side Rails (Width x Depth): 1-3/4 x 3 inch (44 x 76 mm) tubes.
a.	Wall Thickness: 0.125 inch (3.17 mm).
b.	Extend rails 42 inches (1067 mm) above the parapet. Provide rails on opposite side mounted to rear of parapet and extending 42 inches (1067 mm) above parapet and below parapet to roof line.
8.	Grab bars: Connect front and rear side rails with 4 pairs of 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces.
9.	Crossover Platform: Fabricated from 6 x 1-3/4 inch (152 x 44 mm) deep aluminum treads with corrugated surface.
10.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions: 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.75 mm).
b.	Rung Length: 24 inches (610 mm).
11.	Construction: Attach rungs in centerline of side rails by welding.
I.	Accessories:
1.	Wall Support Brackets: Support ladder at top and bottom and at 48 inches (1219 mm) maximum intermediate points with 2 x 1/4 inch (51 x 6 mm) minimum flat bar aluminum wall brackets. 
a.	Clearance From Wall to Center Line of Rungs: 7 inches (178 mm) minimum.
2.	Floor Support Brackets: Anchor side rails to floor with 2 x 1/4 inch (51 x 6 mm) minimum flat bar aluminum floor brackets.
3.	Security Door: Hinged security door to cover bottom rungs and prevent unauthorized roof access.
a.	Construction: 1/8 inch (3 mm) flat aluminum sheet covering front of ladder.
b.	Equip door with continuous aluminum hinge and lock.
4.	Safety Post Extension: For fixed ladders constructed of tubular aluminum sections with adjustable mounting brackets for attachment to top of ladder.
a.	Operation: Upward and downward movement controlled by operator. Post locks when fully extended. 
b.	Use in accordance with the manufacturer's instructions.
2.3	FIXED, INCLINED, ALUMINUM, LADDERS
A.	Performance and Design requirements:
1.	Access ladders shall be designed and installed to comply with ANSI A14.3. and OSHA 1910.23 minimum standards.
2.	OSHA 1910.25.
B.	Material:
1.	Extruded Aluminum: ASTM B221, Alloy 6061 Temper T-6, non-spark.
2.	Sheet Aluminum: ASTM B209 6061 Temper T-6.
3.	Finish: Mill finished aluminum.
C.	General Fabrication:
1.	Field verify ladder dimensions prior to fabrication.
2.	Fabricate to designs indicated on Drawings and to meet performance requirements as specified in this specification.
3.	Components shall be welded and bolted. Ladder may require minor field assembly.
D.	Basis of Design: Ship ladder with handrail; Model No. U-501 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft ___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Angle of Inclination: 50 degrees
4.	Angle of Inclination: 70 degrees.
5.	Angle of Inclination: ___ degrees.
6.	Angle of Inclination: As indicated on Drawings.
7.	Treads (Depth x Height x Length): 6 x 1-3/4 x 24 inches (152 x 44 x 610 mm) aluminum Channel extrusion.
a.	Surface: Corrugated surface.
b.	Surface: Abrasive filled corrugations.
8.	Tread Spacing: 12 inch (305 mm) max tread spacing.
9.	Tread Spacing: As indicated on Drawings and reviewed shop drawings.
10.	Treads to be welded to ladder stringer.
11.	Stringers: 6 x 2-1/2 inches (152 x 64 mm) aluminum channel.
12.	Handrail: 1-1/4 inch (32 mm) diameter aluminum pipe 
a.	Form returns with 6 inch (152 mm) radius.
b.	Attach rail to stringer with pipe sections spaced at no more than 48 inches (1219 mm) such that rail projects approximately 6 inches (152 mm) above stringer.
c.	Handrail to extend above top tread a minimum of 42 inches (1067 mm).
E.	Basis of Design: Ship ladder with roof access; Model No. U-502 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft ___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Angle of Inclination: 50 degrees
4.	Angle of Inclination: 70 degrees.
5.	Angle of Inclination: ___ degrees.
6.	Angle of Inclination: As indicated on Drawings.
7.	Treads (Depth x Height x Length): 6 x 1-3/4 x 24 inches (152 x 44 x 610 mm) aluminum channel extrusion.
a.	Surface: Corrugated surface.
b.	Surface: Abrasive filled corrugations.
8.	Tread Spacing: 12 inch (305 mm) max tread spacing.
9.	Tread Spacing: As indicated on Drawings and reviewed shop drawings.
10.	Treads to be welded to ladder stringer.
11.	Stringers: 6 x 2-1/2 inches (152 x 64 mm) aluminum channel.
12.	Handrail: 1-1/4 inch (32 mm) diameter aluminum pipe 
a.	Form returns with 6 inch (152 mm) radius.
b.	Attach rail to stringer with pipe sections spaced at no more than 48 inches (1219 mm) such that rail projects approximately 6 inches (152 mm) above stringer.
c.	Extend rail above ladder such that top of rail is approximately 6 inches (152 mm) above top tread and below roof hatch door.
F.	Basis of Design: Ship ladder with cross over access; Model No. U-503 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft ___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Angle of Inclination: 50 degrees
4.	Angle of Inclination: 60 degrees.
5.	Angle of Inclination: ___ degrees.
6.	Angle of Inclination: As indicated on Drawings.
7.	Treads (Depth x Height x Length): 6 x 1-3/4 x 24 inches (152 x 44 x 610 mm) aluminum Channel extrusion.
a.	Surface: Corrugated surface.
b.	Surface: Abrasive filled corrugations.
8.	Tread Spacing: 12 inch (305 mm) max tread spacing.
9.	Tread Spacing: As indicated on Drawings and reviewed shop drawings.
10.	Treads to be welded to ladder stringer.
11.	Configuration: Two opposing inclined ladders connected by cross over platform as shown on Drawings and reviewed shop drawings.
a.	Distance between base of opposing ladders: ___ inches (___ mm).
b.	Distance between base of opposing ladders: As indicated on Drawings.
c.	Cross Over Span: ___ inches (___ mm).
d.	Cross Over Span: As indicated on Drawings.
e.	Clear Height: ___ inches (___ mm).
f.	Clear Height: As indicated on Drawings.
12.	Stringers: 6 x 2-1/2 inches (152 x 64 mm) aluminum channel.
a.	Top of Opposing Stringers: Connected with 6 x 2-1/2 inches (152 x 64 mm) channel which forms support for platform. 
13.	Cross Over Platform: At top of ship ladder fabricated from 6 x 1-3/4 inch (152 x 44 mm) deep aluminum treads with corrugated surface.
14.	Railings, Handrail and Guardrail: 1-1/4 inch (32 mm) diameter aluminum pipe to configuration shown on Drawings and reviewed shop drawings.
a.	Form returns with 6 inch (152 mm) radius.
b.	Provide 42 inches (1067 mm) high guardrail on either side of cross over platform.
c.	Attach rail to stringer with pipe sections spaced at no more than 48 inches (1219 mm) such that rail projects approximately 6 inches (152 mm) above stringer.
G.	Basis of Design: Ship ladder with platform; Model No. U-504 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft ___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Angle of Inclination: 50 degrees
4.	Angle of Inclination: 70 degrees.
5.	Angle of Inclination: ___ degrees.
6.	Angle of Inclination: As indicated on Drawings.
7.	Treads (Depth x Height x Length): 6 x 1-3/4 x 24 inches (152 x 44 x 610 mm) aluminum Channel extrusion.
a.	Surface: Corrugated surface.
b.	Surface: Abrasive filled corrugations.
8.	Tread Spacing: 12 inch (305 mm) max tread spacing.
9.	Tread Spacing: As indicated on Drawings and reviewed shop drawings.
10.	Treads to be welded to ladder stringer.
11.	Stringers: 6 x 2-1/2 inches (152 x 64 mm) aluminum channel. The top of stringers shall return horizontally to wall and form support for platform. 
12.	Platform: 24 x ___ inches (610 x ___ mm) long platform at top of ship ladder fabricated from 6 x 1-3/4 inches (152 x 44 mm) aluminum treads with corrugated surface.
13.	Railings, Handrail and Guardrail: 1-1/4 inch (32 mm) diameter aluminum pipe to configuration shown on Drawings and reviewed shop drawings.
a.	Form returns with 6 inch (152 mm) radius.
b.	Guardrail: 42 inches (1067 mm) high on either side of platform.
c.	Attach rail to stringer with pipe sections spaced at approximately no more than 48 inches (1219 mm) such that rail projects approximately 6 inches (152 mm) above stringer.
H.	Basis of Design: Folding mezzanine access ship ladder; Model No. U-505 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft ___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Angle of Inclination: 60 degrees
4.	Angle of Inclination: 70 degrees.
5.	Angle of Inclination: ___ degrees.
6.	Angle of Inclination: As indicated on Drawings.
7.	Treads (Depth x Height x Length): 6 x 1-3/4 x 24 inches (152 x 44 x 610 mm) aluminum Channel extrusion.
a.	Surface: Corrugated surface.
8.	Treads: Form with two 1-1/4 inch (32 mm) square tubes by 24 inches (610 mm) long with corrugated surfaces. 
a.	Equally space treads as indicated on Drawings and reviewed shop drawings.
b.	Attach treads to stringers by welding.
9.	Operation: Folding ladder shall store against wall with stringers in vertical position. 
a.	The top of ladder shall pivot with sliding hinge assembly with stainless steel pin to inclined use position.
10.	Stringers: 3 x 1 inch (76 x 25 mm) aluminum channel. Equip bottom of stringer with non-skid rubber foot. The top of stringer shall be supported by wall bracket fabricated from 3 x 1/4 inch (76 x 6 mm) thick aluminum plate.
11.	Handrail: Fabricate from 1-1/4 inch (32 mm) diameter aluminum pipe 
a.	Form returns with 6 inches (152 mm) radius.
b.	Attach rail to stringer such that rail projects approximately 6 inches (152 mm) above stringer.
c.	Extend rail above ladder to form guardrail extending 42 inches (1067 mm) above top tread. 
I.	Basis of Design: Folding Hatch Access ship ladder; Model No. U-506 as manufactured by UPNOVR, Inc. Designed to meet or exceed OSHA and ANSI A14.3.
1.	Accommodation Height: ___ ft ___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Angle of Inclination: 60 degrees
4.	Angle of Inclination: 70 degrees.
5.	Angle of Inclination: ___ degrees.
6.	Angle of Inclination: As indicated on Drawings.
7.	Treads (Depth x Height x Length): 6 x 1-3/4 x 24 inches (152 x 44 x 610 mm) aluminum Channel extrusion.
a.	Surface: Corrugated surface.
8.	Treads: Form with two 1-1/4 inch (32 mm) square tubes by 24 inches (610 mm) long with corrugated surfaces. 
a.	Equally space treads as indicated on Drawings and reviewed shop drawings.
b.	Attach treads to stringers by welding.
9.	Operation: Folding ladder shall store against wall with stringers in vertical position. 
a.	The top of ladder shall pivot with sliding hinge assembly with stainless steel pin to inclined use position.
10.	Stringers: 3 x 1 inch (76 x 25 mm) aluminum channel. Equip bottom of stringer with non-skid rubber foot. The top of stringer shall be supported by wall bracket fabricated from 3 x 1/4 inch (76 x 6 mm) thick aluminum plate.
11.	Handrail: Fabricate from 1-1/4 inch (32 mm) diameter aluminum pipe 
a.	Form returns with 6 inches (152 mm) radius.
b.	Attach rail to stringer such that rail projects approximately 6 inches (152 mm) above stringer.
c.	Extend rail above ladder to form guardrail extending 42 inches (1067 mm) above top tread.
J.	Basis of Design: Counterbalanced swing down ladder; Model U-507 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft ___ mm).
2.	Accommodation Height: As indicated on Drawings.
3.	Angle of Inclination: 50 degrees
4.	Angle of Inclination: 70 degrees.
5.	Angle of Inclination: ___ degrees.
6.	Angle of Inclination: As indicated on Drawings.
7.	Treads (Depth x Height x Length): 6 x 1-3/4 x 24 inches (152 x 44 x 610 mm) aluminum Channel extrusion.
a.	Surface: Corrugated surface.
8.	Tread Spacing: 12 inch (305 mm) max tread spacing.
9.	Tread Spacing: As indicated on Drawings and reviewed shop drawings.
10.	Treads to be welded to ladder stringer.
11.	Operation: Swing down ladder is attached to upper mezzanine or floor structure with pivoting counterbalanced mechanism. The ladder shall store horizontally and can be placed in inclined access position with pull rope.
12.	Stringers: 6 x 2-1/2 inches (152 x 64 mm) aluminum channel. Attach lead counter weights to the top sides of stringers. Design ladder such that stringers project above upper floor level when ladder is in inclined position.
13.	Handrail: 1-1/4 inch (32 mm) diameter aluminum pipe 
a.	Form returns with 6 inch (152 mm) radius.
b.	Attach rail to stringer such that rail projects a minimum of 42 inches (1067 mm) above treads when ladder is in inclined position.
14.	Operating Mechanism: Pivoting hinged counterbalanced mechanism attached to support structure with brackets as detailed on approved shop drawings.
2.4	CAGED ALUMINUM ACCESS LADDERS
A.	Basis of Design: Roof hatch Access Ladder. Model No. U-300 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft (___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Side Rails: 1-3/4 x 3 inches (44 x 76 mm). Wall thickness: 1/8 inch (3.17 mm).
4.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions (Width x Depth): 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.75 mm).
b.	Rung Length: 24 inches (610 mm).
5.	Construction: Attach rungs in centerline of side rails by welding.
B.	Basis of Design: Roof over rail extension ladder. Model No. U- 301 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft (___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Side Rails: 1-3/4 x 3 inches (44 x 76 mm). Wall thickness: 1/8 inch (3.17 mm).
a.	Extend rails 42 inches (1067 mm) above the roof line or parapet.
4.	Extension: At top of side rails provide 19 inch (483 mm) extension, 28 inches (711 mm) high, constructed from 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces.
5.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions (Width x Depth): 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.75 mm).
b.	Rung Length: 24 inches (610 mm).
6.	Construction: Attach rungs in centerline of side rails by welding.
C.	Basis of Design: Return to rear of parapet ladder. Model No. U-302 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft (___ mm).
2.	Accommodation Height: As indicated on Drawings.
3.	Cross Over Span: ___ ft ___ mm).
4.	Cross Over Span: As indicated on Drawings.
5.	Side Rails: 1-3/4 x 3 inches (414 x 76 mm). Wall thickness: 1/8 inch (3.17 mm).
a.	Extend rails 42 inches (1067 mm) above the roof line or parapet. Provide rails on opposite side mounted to rear of parapet and extending 42 (1067 mm) inches above parapet and below parapet to roof line.
6.	Grab Bars: Connect front and rear side rails 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces.
7.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions (Width x Depth): 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.75 mm).
b.	Rung Length: 24 inches (610 mm).
8.	Construction: Attach rungs in centerline of side rails by welding.
D.	Basis of Design: Ladder with platform and return to rear of parapet. Model No. U-303 as manufactured by UPNOVR, Inc.
1.	Accommodation Height: ___ ft (___ mm).
2.	Accommodation Height: As indicated on Drawings.]
3.	Cross Over Span: ___ ft ___ mm).
4.	Cross Over Span: As indicated on Drawings.]
5.	Side Rails: 1-3/4 x 3 inches (414 x 76 mm). Wall thickness: 1/8 inch (3.17 mm).
a.	Extend rails 42 inches (1067 mm) above the roof line or parapet. Provide rails on opposite side mounted to rear of parapet and extending 42 (1067 mm) inches above parapet and below parapet to roof line.
6.	Grab Bars: Connect front and rear side rails 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces.
7.	Cross Over Platform: Fabricated from 6 x 1-3/4 inch (152 x 44 mm) deep aluminum treads with corrugated surface.
8.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions (Width x Depth): 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.75 mm).
b.	Rung Length: 24 inches (610 mm).
9.	Construction: Attach rungs in centerline of side rails by welding.
E.	Basis of Design: Ladder with intermediate platforms and roof over rail. Model No. U-390 as manufactured by UPNOVR, Inc.
1.	Configuration: Ladder to be configured with two _____ caged vertical ladder segments offset from each other and connected with intermediate platform with guardrail as indicated on Drawings. Nominal heights of ladder segments:
a.	Lower Segment: ___ ft (___ mm).
b.	Lower Segment: As indicated on Drawings.]
c.	Upper Segment: ___ ft (___ mm).
d.	Upper Segment: As indicated on Drawings.]
2.	Side Rails: 1-3/4 x 3 inches (44 x 76 mm). Wall thickness: 1/8 inch (3.17 mm).
a.	Extend rails of upper ladder 42 inches (1067 mm) above the roof line or parapet. 
3.	Extension: At top of upper segment side rails provide 19 inches (483 mm) extension, 28 inches (711 mm) high. Construct from 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces.
4.	Rungs: Corrugated surfaces. Rated Load: 1,000 lbs (453.6 kg). 
a.	Dimensions (Width x Depth): 1-1/4 inch (32 mm) square tubing.
1)	Wall Thickness: 0.14 inch (3.75 mm).
b.	Rung Length: 24 inches (610 mm).
5.	Construction: Attach rungs in centerline of side rails by welding.
6.	Intermediate Cross Over Platform: Fabricated from 6 x 1-3/4 inch (152 x 44 mm) deep aluminum treads with corrugated surfaces.
7.	Guardrail: At intermediate platform, Constructed from 1-1/4 inch (32 mm) square tube grab bars with corrugated surfaces. Height: 42 inch (1067 mm) high and connect side rails of two ladder segments as detailed on Drawings and reviewed shop drawings.
F.	Safety Cage:
1.	Equip ladders with safety cages as detailed on Drawings and reviewed shop drawings.
2.	Fabricate from 2 x 1/4 inch (51 c 6 mm) thick aluminum vertical strips and horizontal loops welded to form a cage around the ladder.
a.	Bottom Loop Radius: 17-1/2 inches (444 mm).
b.	Radius of Other Loops: 13-1/2 inches (343 mm). 
c.	Provide 5 vertical strips equally spaced around perimeter of cage.
d.	Space horizontal loops at 48 inches (1219 mm) maximum.
3.	Minimum clearance from ladder to back of cage: 27 inches (686 mm).
4.	Start cage 7 ft (2.134 m) above grade.
5.	Start cage 8 ft (2.438 m) above grade.
6.	Start cage __ ft (__ m) above grade.
7.	Start cage 7 ft (2.134 m) above intermediate platform.
8.	Start cage 8 ft (2.438 m) above intermediate platform.
9.	Start cage __ ft (__ m) above intermediate platform.
10.	Start cage 7 ft (2.134 m) above roof level.
11.	Start cage 8 ft (2.438 m) above roof level.
12.	Start cage __ ft (__ m) above roof level.
13.	Extend safety cage 42 inches (1067 mm) minimum above top rung and attach to side rails as detailed on Drawings and reviewed shop drawings.
14.	Shipping: Ship safety cage knocked down with connection hardware for field assembly.
G.	Accessories:
1.	Support Wall Brackets: Support ladder at top and bottom and at 48 inches (1219 mm) maximum intermediate points with 2 x 1/4 inch (51 x 6 mm) minimum flat bar aluminum wall brackets. 
a.	Clearance From Wall to Center Line of Rungs: 7 inches (178 mm) minimum.
2.	Security Door: Hinged security door to cover bottom rungs and prevent unauthorized roof access.
a.	Construction: 1/8 inch (3 mm) flat aluminum sheet covering front of ladder. 
1)	Equip door with continuous aluminum hinge and padlock hasp.
3.	Safety Post Extension: For fixed ladders constructed of tubular aluminum sections with adjustable mounting brackets for attachment to top of ladder.
a.	Operation: Upward and downward movement controlled by operator. 
1)	Post locks when fully extended. 
b.	Use it in accordance with the manufacturer's instructions.
PART 3    EXECUTION
3.1	EXAMINATION
A.	Do not begin installation until the substrates have been properly constructed and prepared.
B.	If substrate preparation is the responsibility of another installer, notify Architect in writing 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.
C.	Prior to fabrication, field verify required dimensions.
D.	Coordinate provision of access ladder with provision of roof hatch specified in Section 07 72 50 - Roofing Fasteners*. Ensure height and position of ladder is compatible with roof hatch curb.
E.	Coordinate Ladder Installation with Construction of: 
1.	CMU walls specified in Section 04 22 00 - Concrete Unit Masonry. 
a.	Ensure block walls are adequately reinforced and cells grouted for attachment of brackets and support of ladder.
2.	Metal stud walls specified in Section 05 40 00 - Cold-Formed Metal Framing
a.	Ensure adequate support and blocking for attachment of brackets and support of ladder.
3.	Stud partitions specified in Section 09 21 16.33 - Gypsum Board Area Separation Wall Assemblies.
a.	Ensure adequate support and blocking for attachment of brackets and support of ladder.
F.	Insulate dissimilar metals to prevent electrolysis with bituminous paint or non-absorptive isolation pad to prevent contact.
3.3	INSTALLATION
A.	Install in accordance with manufacturer's instructions, approved submittals, and in proper relationship with adjacent construction.
B.	Vertical Aluminum Access Ladders:
1.	Install ladder in accordance with reviewed shop drawings.
2.	Position ladder such that:
a.	Side Rails: End 3 inches above the floor.
b.	Side Rails: Contact floor. 
c.	The center of the rungs are 7 inches (178 mm) from the wall. 
3.	Securely anchor support brackets with fasteners of type and size recommended by the Architect.
a.	Place wall brackets at the top and bottom of ladder.
b.	Place wall brackets at top and floor brackets at bottom of ladder.
c.	Place intermediate wall brackets at 48 inches (1219 mm) maximum.
4.	Ensure the ladder is vertical, plumb, and rigid.
5.	Ensure the ladder is aligned with the center of roof hatch.
6.	Install security door assembly and adjust for smooth operation.
7.	Safety post extension: Attach to top 2 rungs of ladder and centered between side rails. Adjust the post to extend 42 inches (1067 mm) above top rung when roof hatch is open, and post is fully extended.
8.	After installation inspect ladder to verify proper, secure, and safe installation.
9.	Clean ladder using clean water and mild detergent. Do not use abrasive agent, steel wool, or harsh chemicals. Rinse with clean water.
C.	Fixed, Inclined, Aluminum, Ladders.
1.	Install inclined ladder in accordance with manufacturer's instructions and reviewed shop drawings.
2.	Securely anchor support brackets with fasteners of type specified under other sections. Place wall brackets at top and floor brackets at bottom of ladder.
3.	Ensure ladder is plumb, and rigid.
4.	Ensure the ladder is aligned with the center of roof hatch.
D.	Fixed, Wall Mounted, Vertical, Caged Aluminum Ladders:
1.	Install ladder and safety cage in accordance with manufacturer's instructions and reviewed shop drawings.
2.	Position ladder such that side rails end 3 inches (76 mm) above floor and center of rungs are a minimum of 7 inches (178 mm) from wall. 
3.	Securely anchor support brackets with fasteners of type specified under other sections. Place wall brackets at the top and bottom of ladder. Place intermediate wall brackets at 48 inches (1219 mm) maximum.
4.	Ensure ladder and safety cage are vertical, plumb, and rigid.
5.	Ensure the ladder is aligned with the center of roof hatch.
6.	Install security door assembly and adjust for smooth operation.
7.	Safety post extension: Attach to top 2 rungs of ladder and centered between side rails. Adjust the post to extend 42 inches (1067 mm) above top rung when roof hatch is open, and post is fully extended.
3.4	FIELD QUALITY CONTROL
A.	Field Inspection: Coordinate field inspection in accordance with appropriate sections in Division 01.
B.	Manufacturer's Services: Coordinate manufacturer's services in accordance with appropriate sections in Division 01.
C.	After Installation Ladder Inspection: Verify proper, secure, and safe installation.
3.5	CLEANING AND PROTECTION
A.	Clean products in accordance with the manufacturers recommendations. 
1.	Clean ladder using clean water and mild detergent. Do not use abrasive agent, steel wool, or harsh chemicals. Rinse with clean water.
B.	Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION