Senior Recreation Center Ladder SpecsEXTERIOR ROOF ACCESS LADDER WARRANTY
1. Ladder manufacturer has responsibility for an extended Corrective Period for work of
this Section for a period of 5 years from date of Substantial Completion against all the
conditions indicated below, and when notified in writing from Owner, ladder
manufacturer shall promptly and without inconvenience and cost to Owner correct
said deficiencies.
a) Defects in materials and workmanship.
b) Deterioration of material and surface performance below minimum OSHA
standards as certified by independent third party testing laboratory. Ordinary
wear and tear, unusual abuse or neglect excepted.
c) Within the warranty period, the ladder manufacturer shall, at its option, repair,
replace, or refund the purchase price of defective ladder.
2. Ladder manufacturer shall be notified immediately of defective products, and be
given a reasonable opportunity to inspect the goods prior to return. Ladder
manufacturer will not assume responsibility, or compensation, for unauthorized
repairs or labor. Ladder manufacturer makes no other warranty, expressed or
implied, to the merchantability, fitness for a particular purpose, design, sale,
installation, or use, of the ladder; and shall not be liable for incidental or
consequential damages, losses of or expenses, resulting from the use of ladder
products.
EXTERIOR ROOF ACCESS LADDER
A. Fixed Access Ladder
1. Tubular Rail Low Parapet Access Ladder with Platform and Return.
a) Model 503, as manufactured by O’Keeffe’s Inc.
B. Materials
1. Aluminum Sheet: Alloy 5005-H34 to comply with ASTM B209.
2. Aluminum Extrusions: Alloy 6063-T6 to comply with ASTM B221.
C. Finishes
1. Mill finish. As extruded.
2. Clear Anodic Finish: AA-M10C22A41 Mechanical finish as fabricated.
Architectural Class I, clear coating 0.018 mm or thicker.
3. Furnish touchup kit for each type and color of paint finish provided.
D. Fabrication
1. Rungs: Not less than 1-1/4 inches in section and 18–3/8 inches long, formed
from tubular aluminum extrusions. Squared and deeply serrated on all sides.
a) Rungs shall withstand a 1,500 pound load without deformation or failure.
2. Channel Side Rails: Not less than 1/8 inch wall thickness by 3 inches wide.
3. Heavy Duty Tubular Side Rails: Assembled from two interlocking aluminum
extrusions no less than 1/8 inch wall thickness by 3 inches wide. Construction
shall be self-locking stainless steel fasteners, full penetration TIG welds and
clean, smooth and burr-free surfaces.
4. Ship Ladders: Not less than 1-1/4 inches high, 4-1/8 inch deep and 2 feet
wide; tread spacing shall be 1 foot on center. Handrails shall be aluminum
pipe, not less than 1-1/2 inches in diameter with hemispheric end caps.
5. Walk-Through Rail and Roof Rail Extension: Not less than 3 feet 6 inches
above the landing and shall be fitted with deeply serrated, square, tubular
grab rails.
6. Landing Platform: 1-1/2 inches or greater diameter, tubular aluminum
guardrails and decks of serrated aluminum treads.
7. Security Doors: Formed 1/8 inch thick aluminum sheet. Security panels shall
extend on both sides, perpendicular to the door face, to within 2 inches of the
wall. Security door shall be furnished with continuous aluminum piano hinge
and heavy duty forged steel locking hasps.
8. Ship Ladder Seismic Bottom Support: Manufacturer’s standard; two isolation
bearings per stringer.
9. Ladder Safety Post: Retractable hand hold and tie off.
10. Rail and Harness Fall Arrest System: Supplied where specified as alternate
to safety cage and landing platforms, in accordance with OSHA regulation
1910.27; permanently mounted to ladder rungs and complete with necessary
components.
11. Safety Cages
a) Fabricate ladder safety cages to comply with authority having jurisdiction.
Assemble by welding. Spacing of primary hoops, secondary hoops and vertical
bars shall not exceed that required by code.
b) Safety cage hoops and vertical bars: 3/16 inch by 2 inches aluminum bar.
INSTALLATION OF EXTERIOR ROOF ACCESS LADDER
A. Examination:
1. Coordinate anchorages. Furnish setting drawings, templates, and anchorage
structural loads for fastener resistance.
2. Do not begin installation until supporting structure is complete and ladder installation
will not interfere with supporting structure work.
3. If supporting structure is the responsibility of another installer, notify Architect of
unsatisfactory supporting work before proceeding.
B. Installation: Install in accordance with manufacturer's instructions and in proper
relationship with adjacent construction.
C. Protection:
1. Protect installed products until completion of project.