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Precision Ladders, LLC Metal Stairs and Ladders
 
         
SECTION 05510
 
         
METAL STAIRS AND LADDERS
 
         
Copyright 2004 - 2005 ARCAT, Inc. - All rights reserved

          ** NOTE TO SPECIFIER ** Precision Ladders, LLC; products.

This section is based on the products of Precision Ladders, LLC, which is located at:
P. O. Box 2279
Morristown, TN 37816-2279
Toll Free Tel: 800-225-7814
Tel: 423-586-2265
Email: request info
Web: www.PrecisionLadders.com
[ Click Here ] for additional information.

Automatic Electric Disappearing Stairway: Precision offers the best automatic stairway on the market. In the open position - as sturdy as any fixed stair and just as easy to climb with its 52 degree pitch. The Automatic Electric Stairway can be opened or closed with a simple toggle switch. The unit can be supplied with a key operated switch in areas where security is important. As with the Super Simplex, these units can be fabricated with a custom frame to accommodate dropped ceilings. Other optional equipment include a wood veneer door panel with mineral core, warning buzzer to sound when stairway is in motion, emergency manual operation to lower the unit from above and/or below.

Super Simplex Disappearing Stairway: A commercial-grade aluminum folding stairway, is the most structurally superior product of its kind on the market today. Its primary use is for attic access, but when used in conjunction with a Precision Roof Hatch can be used for access to a rooftop.

Availability of optional 2-HOUR FIRE-RATING for use in a fire-rated ceiling.

The Super Simplex is the only stairway available with a frame complete with built-in treads custom fabricated to your exact distance from ceiling to floor above thereby accommodating dropped ceilings.

For secure access to your rooftop equipment, we offer a package unit consisting of a folding stairway, a custom frame to fit distance from ceiling to roof and a custom roof hatch factory-mounted to the top of the frame. This entire unit can then be dropped in from above, secured and flashed in for safe, comfortable roof access.

The Super Simplex is so reliable you can reclaim attic space for storage purposes without the need for a permanent stairway. Many national companies are already using the Super Simplex to maximize use of attic space. Some typical applications are: airport control towers, banks, better residences, bottling plants, churches, drug stores, government buildings, hospitals, laboratories, libraries, museums, restaurants, schools and retail stores.
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          PART 1GENERAL
 
          1.1SECTION INCLUDES
          ** NOTE TO SPECIFIER ** Delete items below not required for project.
 
          A.Automatic electric disappearing stairways.
 
          B.Manual disappearing stairways.
 
          C.Aluminum fixed vertical ladders.
 
          D.Aluminum ships ladders.
 
          1.2RELATED SECTIONS
          ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
          A.Section 05120 - Structural Steel: Roof structure and opening support.
 
          B.Section 05550 - Metal Fabrications: Miscellaneous metal supports.
 
          C.Section 06100 - Rough Carpentry: Roof framing and opening support.
 
          D.Section 05120 - Structural Steel: Roof framing and support.
 
          E.Section 07400 - Membrane Roofing: Roof curb flashing.
          ** NOTE TO SPECIFIER ** Manual model only on 2 hour fire-rated model. Delete if not required.
 
          F.Section 08310 - Access Doors and Panels.
          ** NOTE TO SPECIFIER ** Automatic model only. Delete if not required.
 
          G.Section 16050 - Basic Electrical Materials and Methods: Electrical service, disconnect and wiring.
 
          1.3REFERENCES
 
          A.ANSI A14.3: Ladders - Fixed - Safety Requirements.
 
          B.ANSI A14.9: Safety Requirements for Ceiling Mounted Disappearing Climbing Systems.
 
          C.OSHA 1910.27: Fixed Ladders.
 
          1.4SUBMITTALS
 
          A.Submit under provisions of Section 01300.
 
          B.[ Product Data ]: Manufacturer's data sheets on each product to be used, including:
          1.Preparation instructions and recommendations.
          2.Storage and handling requirements and recommendations.
          3.Installation methods.
          ** NOTE TO SPECIFIER ** Delete below if no stairs.
 
          C.Shop Drawings for Stairs:
          1.Plan and section of stair installation.
          2.Indicate rough opening dimensions for ceiling and/or roof openings.
          ** NOTE TO SPECIFIER ** Delete below if no ladders.
 
          D.Shop Drawings for Ladders:
          1.Plan and section of ladder installation.
 
          1.5DELIVERY, STORAGE, AND HANDLING
 
          A.Store products in manufacturer's unopened packaging until ready for installation.
 
          B.Store stairway until installation inside under cover. If stored outside, under a tarp or suitable cover.
 
          1.6WARRANTY
 
          A.Limited Warranty: One year against defective material and workmanship, covering parts only, no labor or freight. Defective parts, if deemed so by the manufacturer, will be replaced at no charge, freight excluded, upon inspection at manufacturer's plant which warrants same.
 
          PART 2PRODUCTS
 
          2.1MANUFACTURERS
 
          A.Acceptable Manufacturer: Precision Ladders, LLC, which is located at: P. O. Box 2279 ; Morristown, TN 37816-2279; Toll Free Tel: 800-225-7814; Tel: 423-586-2265; Email: request info; Web: www.PrecisionLadders.com
          ** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
          B.Substitutions: Not permitted.
 
          C.Requests for substitutions will be considered in accordance with provisions of Section 01600.
          ** NOTE TO SPECIFIER ** Delete automatic stairway if not required.
 
          2.2AUTOMATIC ELECTRIC DISAPPEARING STAIRWAY.
 
          A.Automatic Electric Disappearing Stairway and Components: Stairway, rail, frame, door, drive unit, motor and controls/junction box.
          1.Model: Model AE as manufactured by Precision Ladders LLC.
          2.Capacity: Unit shall support a 1000 lb (453 kg)load without failure.
          3.Performance Standard: Unit shall comply with ANSI A14.9, Commercial Type, for rough openings between 25-1/2 inches (647 mm) to 39 inches (991 mm).
 
          B.Accessories:
          ** NOTE TO SPECIFIER ** Delete wall switch not required. Toggle switch is standard, key operated switch is optional.
          1.Standard toggle wall mounted switch.
          2.Key operated dead-man type wall switch.
          ** NOTE TO SPECIFIER ** Delete operation not required.
          3.Emergency manual operation to lower (only) from above if power fails.
          4.Emergency manual operation to lower (only) from below if power fails.
          5.Emergency manual operation to lower (only) from above or below if power fails.
          6.Warning buzzer.
 
          C.Components:
          1.Stairway Stringer: 7 inches by 0.230 inch (178 mm by 5.8 mm) extruded aluminum channel. Steel rollers at base of each stringer. Pitch: 52 degree.
          2.Stairway Tread: Aluminum channel 6 inches by 20-3/16 inches by 0.225 inch (152 mm by 513 mm by 5.7 mm). Nonskid safety material at walking surface.
          3.Riser Height: 9-1/2 inches (241 mm) maximum.
          4.Railing: Hand/guide rail 1-1/16 inches (27 mm) OD both sides, galvanized.
          5.Frame: 1/8 inch (3 mm) steel formed channel. Height to suit total ceiling thickness.
          ** NOTE TO SPECIFIER ** Delete door style not required.
          6.Door: 1/8 inch (3 mm) aluminum panel. Steel piano hinge.
          7.Door: 1-3/4 (44.5 mm) inches wood with mineral core. Steel piano hinge.
          8.Drive Unit: 1/3 horsepower 246 W), 115 volt instantly reversible motor direct-connected to a reduction gear drive, complete with contactors. Pre-wired control switches. Sealed ball bearing guides. Double 1/8 inch (3 mm) aircraft cable drive.
          9.Finishes: Mill finish on aluminum stairway components. Prime coat on frame. Galvanized handrails.
          ** NOTE TO SPECIFIER ** Delete manual stairway if not required.
 
          2.3MANUAL DISAPPEARING STAIRWAY.
 
          A.Manual Disappearing Stairway and Components: Stairway, rail, frame and door.
          ** NOTE TO SPECIFIER ** Delete one of two models below unless both are required.
          1.Standard Model: Super Simplex Disappearing Stairway as manufactured by Precision Ladders LLC.
          2.Fire-Rated Model: Super Simplex Disappearing Stairway as manufactured by Precision Ladders LLC.
          3.Capacity: Unit shall support a 500 lb (227 kg) total load without failure.
          ** NOTE TO SPECIFIER ** Delete standard below not applicable.
          4.Performance Standard: Unit shall comply with ANSI A14.9, Commercial Type, for rough openings between 25-1/2 inches (647 mm) to 39 inches (991 mm).
          5.Performance Standard: Unit shall comply with ANSI A14.9, Residential Type, for rough openings between 22-1/2 inches (571 mm) to 25 inches (635 mm).
          ** NOTE TO SPECIFIER ** Insert ceiling height below. Height is necessary to determine applicable frame length (54 inches (762 mm) or 64 inches 1626 mm).
          6.Ceiling Height: ______.
 
          B.Accessories:
          1.Steel pole to aid opening and closing stairways.
          ** NOTE TO SPECIFIER ** Delete accessories not required. Keyed lock is standard for fire-rated doors.
          2.Keyed lock for non-fire rated door.
          3.Roof hatch, factory sized and mounted to top of stairway frame.
          ** NOTE TO SPECIFIER ** Fabrication where distance from ceiling below to finished floor above is equal to or less than 1 foot (305 mm). Delete if not required.
 
          C.Components:
          ** NOTE TO SPECIFIER ** Required ceiling opening for floor to ceiling dimensions between 7 feet 0 inches (2134 mm) to 9 feet 9 inches (2972 mm). Delete if not required.
          1.Ceiling Opening: 30 inches by 54 inches (762 mm by 1372 mm).
          ** NOTE TO SPECIFIER ** Models to fit non-standard opening widths are also available minimum: 25-1/2 (647 mm); maximum: 39 inches (990 mm). Delete standard opening above and enter required non-standard opening width below. If standard opening size is acceptable delete custom width below.
          2.Ceiling Opening: __ inches by 54 inches (__ mm by 1372 mm).
          ** NOTE TO SPECIFIER ** Required ceiling opening for floor to ceiling dimensions 9 feet 10 inches (2997 mm) to 12 feet (3658 mm). Delete if not required.
          3.Ceiling Opening: 30 inches by 64 inches (762 mm by 1626 mm).
          ** NOTE TO SPECIFIER ** Models to fit non-standard opening widths are also available minimum: 25-1/2 (647 mm); maximum: 39 inches (990 mm). Delete standard opening above and enter required non-standard opening width below. If standard opening size is acceptable delete custom width below.
          4.Ceiling Opening: __ inches by 64 inches (__ mm by 1626 mm).
          5.Stairway Stringer: 6005-T5 Extruded aluminum channel 5 inches by 1 inch by 1/8 inch (127 mm by 25 mm by 3 mm). Tri-fold design. Steel blade type hinges. Adjustable feet with plastic Mar-guard. Pitch 63 degrees.
          6.Stairway Tread: 6005-T5 extruded aluminum channel 5 3/16 inches by 1 1/4 inches by 1/8 inch (132 mm by 32 mm by 3 mm). Depth is 5 3/16 inches (132 mm). Deeply serrated top surface. Riser Height: 9-1/2 inches (241 mm).
          ** NOTE TO SPECIFIER ** If a non-standard opening width was chosen above, Delete standard clear tread width and insert required clear tread width if required by subtracting 10-1/2 inches (267 mm) from opening width.
          a.Clear Tread Width for Standard Width: 19-1/2 inches (495 mm).
          b.Clear Tread Width for Non-Standard (Custom) Width: _____ inches (___ mm).
          7.Railing: Aluminum bar handrail riveted to stringers, upper section only.
          ** NOTE TO SPECIFIER ** Minimum frame depth for fire rated door. Delete if not required.
          8.Frame: 1/8 inch (3 mm) steel formed channel. 6 inches (152 mm) deep.
          ** NOTE TO SPECIFIER ** Minimum depth for aluminum plate door. Delete if not required.
          9.Frame: 1/8 inch (3 mm) steel formed channel. 5 inches (127 mm) deep.
          ** NOTE TO SPECIFIER ** Delete door style not required.
          10.Aluminum Door: 1/8 inch (3 mm) aluminum panel. Steel piano hinge. Door overlaps bottom flange of frame. Eye bolt accommodates pole for opening and closing door.
          11.Fire Rated Steel Door: 20 gauge (0.912 mm) steel door with 2 hour fire-rated Warnock Hersey label meeting ASTM E-119 and UBC 43-7 requirements, passing 250 degree F (121 degree C) temperature rise in the first 30 minutes. Steel piano hinge. Door is flush with bottom of frame. Hole in paddle-latch accommodates pole for opening and closing door.
          12.Hardware:
          a.Steel blade type hinge connecting stringer sections. Zinc plated and chromate sealed.
          b.Steel operating arms, both sides. Zinc plated and chromate sealed.
          c.Double acting steel springs and V-hooks, both sides.
          d.Rivets rated at 1100 lb (499 kg) shear strength each.
          e.Steel section alignment clips at stringer section joints.
          f.Molded rubber guards at corners of aluminum door panel.
          13.Finishes: Mill finish on aluminum stairway components. Prime coat on frame.
          ** NOTE TO SPECIFIER ** Fabrication where ceiling below to floor above distance is greater than 1 foot (305 mm). (Dropped Ceiling) Delete if not required.
 
          D.Components:
          ** NOTE TO SPECIFIER ** Required ceiling opening for floor to ceiling dimensions between 7 feet 0 inches (2134 mm) to 9 feet 9 inches (2972 mm). Delete if not required.
          1.Ceiling Opening: 30 inches by 54 inches (762 mm by 1372 mm).
          ** NOTE TO SPECIFIER ** Models to fit non-standard opening widths are also available minimum: 25-1/2 (647 mm); maximum: 39 inches (990 mm). Delete standard opening above and enter required non-standard opening width below. If standard opening size is acceptable delete custom width below.
          2.Ceiling Opening: __ inches by 54 inches (___ mm by 1372 mm).
          ** NOTE TO SPECIFIER ** Required ceiling opening for floor to ceiling dimensions 9 feet -10 inches (2997 mm) to 12 feet (3658 mm). Delete if not required.
          3.Ceiling Opening: 30 inches by 64 inches (762 mm by 1626 mm).
          ** NOTE TO SPECIFIER ** Models to fit non-standard opening widths are also available minimum: 25-1/2 (647 mm); maximum: 39 inches (990 mm). Delete standard opening above and enter required non-standard opening width below. If standard opening size is acceptable delete custom width below.
          4.Ceiling Opening: __ inches by 64 inches (__ mm by 1626 mm).
          5.Stairway Stringer: 6005-T5 Extruded aluminum channel 5 inches by 1 inch by 1/8 inch (127 mm by 25 mm by 3 mm). Tri-fold design. Steel blade type hinges. Adjustable feet with plastic Mar-guard. Pitch 63 degrees.
          6.Stairway Tread: 6005-T5 extruded aluminum channel 5 3/16 inches by 1 1/4 inches by 1/8 inch (132 mm by 32 mm by 3 mm). Width is 5 3/16 inches (132 mm). Deeply serrated top surface. Riser Height: 9-1/2 inches (241 mm).
          ** NOTE TO SPECIFIER ** If a non-standard opening width was chosen above, Delete standard clear tread width and insert required clear tread width if required by subtracting 10-1/2 inches (267 mm) from opening width.
          a.Clear Tread Width: 19-1/2 inches (495 mm).
          b.Clear Tread Width: ___.
          ** NOTE TO SPECIFIER ** Standard railing location. Modify as required.
          7.Railing: Aluminum bar handrail riveted to stringers, upper section only.
          8.Frame: Custom fabricated from 1/8 inch (3 mm) steel with factory-installed tread to cover the distance from finished ceiling to finished floor above. Frame shall be on a 63 degree angle on the hinge end in order to continue the climb from ceiling and beyond on the same incline as the folding portion of the unit. The frame shall have pre-drilled and mounted brackets to allow for hanging from and fastening to the floor above.
          ** NOTE TO SPECIFIER ** Delete door style not required. First type is standard, second is optional.
          9.Standard Door: 1/8 inch (3 mm) aluminum panel. Steel piano hinge. Door overlaps bottom flange of frame. Eye bolt accommodates pole for opening and closing door.
          10.Door: 20 gauge (.912 mm) steel door with 2 hour fire-rated Warnock Hersey label meeting ASTM E-119 and UBC 43-7 requirements, passing 250 degree F (121 degree C) temperature rise in the first 30 minutes. Steel piano hinge. Door is flush with bottom of frame. Hole in paddle-latch accommodates pole for opening and closing door.
          11.Hardware:
          a.Steel blade type hinge connecting stringer sections. Zinc plated and chromate sealed.
          b.Steel operating arms, both sides. Zinc plated and chromate sealed.
          c.Double acting steel springs and V-hooks, both sides.
          d.Rivets rating at 1100 lb (500 kg) shear.
          e.Steel section alignment clips at stringer section joints.
          f.Molded rubber guards at corners of aluminum door panel.
          12.Finishes: Mill finish on aluminum stairway components. Prime coat on frame.
          ** NOTE TO SPECIFIER ** Delete aluminum fixed vertical ladder if not required.
 
          2.4ALUMINUM FIXED VERTICAL LADDER
 
          A.Aluminum Fixed Vertical Ladder and Components: Ladder, cage, rest platforms, floor mounting brackets, security doors, walk-thru, and side rails.
          1.Model: Model FL Aluminum Fixed Vertical Ladder as manufactured by Precision Ladders LLC.
          2.Capacity: Unit shall support a 1000 lb (454 kg) loading without failure.
          3.Performance Standard: Units designed and manufactured to meet or exceed ANSI A14.3 and OSHA 1910.27.
 
          B.Components:
          1.Ladder Stringer: 2-1/2 inch by 1-1/16 inch by 1/8 inch (64 mm by 27 mm by 3 mm) extruded 6005-T5 aluminum channel. Pitch: 90 degrees.
          2.Ladder Tread: 2-1/4 inch by 3/4 inch by 1/4 inch (57 mm by 19 mm by 6 mm) extruded 6005-T5 aluminum with deeply serrated top surface.
          3.Ladder Mounting Bracket: 8-1/2 inch by 2 inch by 3 inch by 1/4 inch thick (216 mm by 51 mm by 76 mm by 6 mm) aluminum angle.
          ** NOTE TO SPECIFIER ** Delete Walk-Thru if not required.
          4.Walk-Thru:
          a.Frame: 1-1/4 inch (32 mm) aluminum square tube.
          b.Mounting Brackets: 4 inch by 4 inch by 1/4 inch (102 mm by 102 mm by 6 mm) aluminum.
          c.Side Rails: 42 inch (1067 mm) side rail extension for through ladder exits.
          ** NOTE TO SPECIFIER ** Delete safety cage if ladder is no higher than 20 feet (6096 mm).
          5.Safety Cage:
          a.Bar Hoops: 1/4 inch by 2 inch (6 mm by 51 mm) 6005-T5 aluminum.
          b.Vertical Bars: 1/4 inch by 2 inch (6 mm by 51 mm) 6005-T5 aluminum.
          ** NOTE TO SPECIFIER ** Delete rest platform if ladder is no higher than 30 feet (9144 mm). Other walking surfaces are available.
          6.Rest Platform:
          a.1/8 inch (3 mm) aluminum tread plate.
          b.Platform Size: 37-1/2 inches by 63 inches (953 mm by 1600 mm) standard.
          c.Toe Boards. 6005 T-5 aluminum.
          d.Handrails: 1-2/4 inch (32 mm) aluminum square tube 42 inches (1067 mm) high.
          ** NOTE TO SPECIFIER ** Delete security doors and/or gate if not required.
          7.Security Door: 0.125 inch (3 mm) 3003-H14 aluminum panel 84 inches (2134 mm) tall with padlock provision.
          ** NOTE TO SPECIFIER ** Delete below if not required. Security gate can only be used on caged wall ladders.
          8.Security Gate: Hinged gate at bottom of cage with padlock provision.
          ** NOTE TO SPECIFIER ** Delete fall prevention system if not required on project. These may be used on tower, water tank, and chimney ladders in lieu of cage where code permits.
          9.Fall Prevention System: Complete system with rail, sleeves, and harness to limit any fall to 6 inches (152 mm) or less.
          ** NOTE TO SPECIFIER ** Delete floor brackets if not required; floor brackets are optional.
          10.Floor Brackets: Floor bracket at foot of each stringer, 3 by 2 by 1/4 inch (76 by 51 by 6 mm).
          ** NOTE TO SPECIFIER ** Delete finishes not required on project. Mill finish is standard. Anodized, painted, and powder coatings are optional finishes.
          11.Finishes:
          a.Mill finish on aluminum ladder components.
          b.Anodized.
          c.Painted.
          d.Powder Coat.
          ** NOTE TO SPECIFIER ** Delete aluminum ships ladder if not required.
 
          2.5ALUMINUM SHIPS LADDER
 
          A.Aluminum Ships Ladder and Components: Ladder, mounting brackets and handrails on both sides.
          1.Model: Model SL Aluminum Ships Ladder as manufactured by Precision Ladders LLC.
          2.Capacity: Unit shall support a 500 lb (227 kg) total load without failure.
          3.Ladder Stringer: 5 inch by 2 inch by 3/16 inch (127 mm by 51 mm by 5 mm) extruded 6005-T5 aluminum channel. Pitch: 60 to 75 degrees.
          4.Ladder Tread: 5-3/16 inch (132 mm).
          ** NOTE TO SPECIFIER ** Delete the following tread material not required for project. Aluminum channel is standard.
          a.Standard Tread Material: Extruded 6005-T5 aluminum channel with deeply serrated top surface on top tread.
          b.Custom Tread Material: Checkered plate.
          c.Custom Tread Material: Aluminum grating.
          ** NOTE TO SPECIFIER ** Delete the following clear tread width not required for project. Clear tread with of 26 inches (661 mm) (30 inch (762 mm) ladder width) is standard. Contact manufacturer for clear tread widths over 44 inches (1118 mm) (48 inch (1210 mm) ladder width).
          d.Standard Clear Tread Width: 26 inches (61 mm); ladder width 30 inches (762 mm).
          e.Maximum Clear Tread Width: 44 inches (1118 mm); ladder with 48 inches (1219 mm).
          f.Clear Tread Width: __ inches (___ mm).
          5.Ladder Mounting Brackets:
          a.Floor Bracket: 2 inch by 3 inch by 1/4 inch (51 mm by 76 mm by 6 mm) aluminum angle.
          b.Top Bracket: 4-3/4 inch by 5 inch by 1/4 inch (121 mm by 127 mm by 6 mm) aluminum angle.
          6.Handrails: 1-1/4 inches (32 mm) Schedule 40, 6005-T5 aluminum pipe provided with internal aluminum fittings.
          ** NOTE TO SPECIFIER ** Delete finishes not required on project. Mill finish is standard. Anodized, painted, and powder coatings are optional finishes.
          7.Finishes:
          a.Mill finish on aluminum ladder components.
          b.Anodize.
          c.Painted.
          d.Powder Coat.
 
          2.6FABRICATION
 
          A.Completely fabricate ladder ready for installation before shipment to the site.
 
          B.Completely fabricate handrail components ready for field assembly to ladder before shipment to site.
 
          PART 3EXECUTION
 
          3.1EXAMINATION
          ** NOTE TO SPECIFIER ** Delete below if no stairs.
 
          A.Do not begin installation until rough opening and structural support have been properly prepared.
 
          B.If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
 
          C.Examine materials upon arrival at site. Notify the carrier and manufacturer of any damage.
 
          3.2INSTALLATION
          ** NOTE TO SPECIFIER ** The automatic disappearing stair system requires a ceiling opening of 2 feet-6 inches (762 mm) by 6 feet-0 inches (1829 mm) for floor to floor dimensions up to 14 feet-0 inches (4267 mm); and, 2 feet-6 inches (762 mm) by 7 feet-0 inches (2134 mm) for floor to floor dimensions over 14 feet-0 inches (4267 mm). Headroom above the second level and behind the at-rest stairway is required. (Consult manufacturer for dimensions)
 
          A.Install in accordance with manufacturer's instructions.
 
          3.3PROTECTION
 
          A.Protect installed products until completion of project.
 
          B.Touch-up, repair or replace damaged products before Substantial Completion.
 
         
END OF SECTION