All ladders shall be submitted and approved prior to fabrication showing; full dimensions, wall and floor attachments, materials, construction and finish. All ladders must comply with all safety ordinances pertinent to installation. Materials shall be electrolysis and maintenance free aluminum or #302 stainless steel. Ladders shall be "SURE STEP" Model CG, Exterior Cage Ladder 26" (660.4mm) wide, with "Walk through rails". Ladder railings shall extend 42" (1066.8mm) above the top step of the ladder for safe roof egress and ingress, with dual rails extending 16" (406.4mm) toward the roof area above the parapet, as manufactured by Royalite Manufacturing Inc., 1055 Terminal Way, San Carlos, CA 94070-3226, (800) 875-9548.

Steps shall be 2" x 1" (50.8 x 25.4mm) in section by 24" (609.6mm) long, extruded from 6063-T5 aluminum, serrated on the top surface, smooth and rounded on the sides and bottom. Steps shall carry a 1200# (544.31 kg) load without failing.

Heavy-duty side rails shall be extruded from 6063-T5 aluminum, no less than .125" (3.175mm) wall thickness by 4" (101.6mm) wide. Rails shall be rounded on the corners and protected on the exterior to prevent tampering or vandalism of the step fasteners. Slide rails shall be constructed using 302 stainless steel self locking fasteners, full penetration inert gas heliarc welds, ground smooth and burr free.

Walk through rails shall be made of 6063-T5 extruded aluminum pipe not less than 7/8" (22.25mm) in diameter, formed with rounded corners that extend 42" (1066.8mm) above the top step, with dual rails extending 16" (406.4mm) inward, toward the roof surface over the parapet.

Cage Hoops shall be made of 6063-T5 extruded aluminum. Hoops shall be 3/16" x 2" (4.76mm x 50.8mm) solid bar stock, with a radius of 14" (355.6mm). The bottom hoop shall have a radius of 18" (457.2mm). Vertical bars of same material shall be less than 10" (254.0) apart to prevent access to the ladder through the cage. The bottom hoop of the cage shall be a minimum of 96" (2438.4mm) from the ground floor.

Finish shall be mill finish or UV protected polyurethane in manufacturers' standard color or OSHA safety yellow color as specified by the architect. Finish to be applied over a chromatized surface pretreatment.

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