Model 533 Cage Ladder - High Parapet Access with Platform and Return
Ladder Specification 05510 / 055100
- OSHA requires safety cages in access ladders at 24'. O'Keeffe's recommends safety cages at 20'.
- OSHA requires landing platforms at 50' intervals. O'Keeffe's recommends landing platforms at 25' intervals.
- Safety cages are recommended on all ladders on high or hazardous areas.
Ladders shall be detailed and submitted for approval prior to fabrication. Full dimensions, wall and floor attachments, materials, construction and finish must be shown and comply with all safety orders pertinent to the installation.
Furnish and install ladder model code ______________ as manufactured by OKeeffes Inc., 325 Newhall Street, San Francisco, California 94124, 415.824.4900, at locations shown on drawings. Refer to specifying guide for model code. Prior approval by architect required for substitution.
Rungs shall be no less than 1-1/4" (31.7 mm) in section and 18-3/8" (466.7 mm) long, formed from tubular aluminum extrusions, alloy 6061-T6 and shall be squared and deeply serrated on all sides. Rungs shall be able to withstand a 1,500 lb. load without failure.
Heavy Duty Tubular Side Rails where specified, shall be assembled from two interlocking aluminum extrusions no less than 1/8" (3.2 mm) wall thickness by 3" (76.2 mm) wide. Construction shall be self-locking stainless steel fasteners, full penetration TIG welds and clean, smooth and burr-free surfaces.
Ship Ladders shall have deeply serrated rungs no less than 1-1/4" (31.7 mm) high, 4-1/8" (104.8 mm) deep and 2 (609.6 mm) wide, tread spacing shall be 1 (304.8 mm) on center and angle of rise shall be 60°-75° or as shown on approved drawings. Handrails shall be aluminum pipe, no less than 1-1/2" (38.1 mm) in diameter, with hemispherical safety end caps.
Walk-Through Rail and Roofover Rail Extension where specified, shall extend no less than 3 6" (1,066.8 mm) above the landing and shall be fitted with deeply serrated, square, tubular grab rails.
Safety Cage as required on all ladders over 24 (7,315 mm), shall be fabricated from 3/16" (4.8 mm) by 2" (50.8 mm) aluminum bar, alloy 6063-T5.
Landing Platform (LP) as required at 50 (15,240 mm) intervals above the bottom of the ladder, complete with 1-1/2" (38.1 mm) or greater diameter, tubular aluminum guardrails and decks of serrated aluminum treads.
Security Door (SD) size as specified, shall be formed 1/8" (3.2 mm) thick aluminum sheet, alloy 5052. Security panels shall extend on both sides, perpendicular to the door face, to within 2" (50.8 mm) of the wall. Security door shall be furnished complete with continuous aluminum piano hinge and heavy duty forged steel locking hasps.
Safety Post - retractable hand hold and tie off
Rail and Harness Fall Arrest System (FA) supplied where specified as alternate to safety cage and landing platforms, in accordance with OSHA regulation 1910.27, shall be permanently mounted to ladder rungs and complete with necessary components.
Finish shall be mill finish as extruded, anodized, or powder coat finish applied over a chemically pretreated surface in manufacturers standard color as selected by the architect.
Installation shall be according to manufacturers recommendations.
Guaranteed against defects in material and workmanship for five (5) years by OKeeffes Inc.
Complete 3-part specifications may be downloaded from our website.
325 Newhall Street
San Francisco, CA 94124
Tel: (415) 822-4222
Tollfree: (888) 653-3333 (1-888-OKEEFFES)
Fax: (415) 822-5222