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THE CITY OF SUNNY ISLES BEACH <br />PROJECT NO. 21-1011 <br />BUILDING DEPARTMENT RELOCATION TO ANNEX <br /> <br />Project No. 21-1011 November 2024 055100 Fixed Metal Ladders-4 <br />4. Provide handrails of 1-1/4 in (32 mm) round serrated aluminum tubing with cast <br />or extruded aluminum fittings. <br /> <br />5. Furnish ladder with four mounting brackets. <br />D. Folding Wall Ladders: 24 inches (610 mm) wide. <br /> <br />1. Slope: 60 degrees; 6-inch (152 mm) wide aluminum nonslip steps mounted on <br />10-13/32 inches (264 mm) centers to 5-1/4-inch (133 mm) aluminum side rails. <br /> <br />2. Slope for Ladders Less than 10 Feet: 70 degrees; 3-inch (76 mm) wide aluminum <br />steps mounted on 12-inch (305 mm) centers to 2-7/8-inch (73 mm) aluminum <br />side rails. <br /> <br />3. Slope for Ladders 10 feet and Greater: 70 degrees; 4-inch (102 mm) wide <br />aluminum steps mounted on 12-inch (305 mm) centers to 4-1/8 in (105 mm) <br />aluminum side rails. <br /> <br />4. Slope: 80 degrees; 3-inch (76 mm) wide aluminum steps mounted on 12-inch <br />(305 mm) centers to 2-7/8-inch (73 mm) aluminum side rails. <br /> <br />5. Provide handrails of 1-1/4 in (32 mm) round serrated aluminum tubing with cast <br />or extruded aluminum fittings and four mounting brackets. <br /> <br />6. Fasten each step with not less than eight aluminum aircraft rivets. <br /> <br />7. Furnish with mounting bracket-slide assemblies to allow flat storage against wall <br />and non-marking solid rubber feet for secure installation. <br />E. Retractable Wall Ladders: <br /> <br />1. Extruded aluminum profiles. <br /> <br />2. Serrated rungs 1-1/8 inches (29 mm) in diameter, connected to 2–7/8-inch (73 <br />mm) side rail channels with cast aluminum rung connectors, each secured to <br />rails by means of four solid aircraft rivets. <br /> <br />3. Furnish with retractable mounting bracket assemblies for flat storage against the <br />wall, non-marking solid rubber feet, and rubber plugs to provide closed end <br />protection at top of side rails. <br />2.4 FINISHES <br />A. Provide all aluminum in standard mill finish. <br />B. Factory finish all aluminum surfaces with manufacturer's standard powder coating <br />system. <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Do not begin installation until substrates have been properly prepared.