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SECTION 05 51 33
METAL LADDERS
 
 
Copyright 2018 - 2018 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** O'Keefe's Inc.; access, ship and cage ladders.
This section is based on the products of O'Keefe's Inc., which is located at:
100 N. Hill Dr. Suite 12
Brisbane, CA 94005
Toll Free Tel: 888-653-3333
Tel: (415) 822-4222
Fax: (415) 822-5222
Email:
Web: http://www.okeefes.com
[ Click Here] for additional information.
Since 1939, O'Keeffe's has been a name synonymous with innovation and design. Holding the first patent in 1951 on using extrusions in the construction of skylights, allowing the weeping of any condensation or leakage to be taken to the outside by the extrusion's built-in guttering system.
It wasn't long before the company was recognized for excellence in custom skylights, bringing natural daylight to thousands of creative and innovative monumental projects worldwide. These include the Museum of Modern Art and the Court of Appeals in San Francisco, the World Bank in Washington D.C., the Como Conservatory in St. Paul, MN, the Getty Museum and Gateway Center in Los Angeles, the Houston Galleria in Houston, and many more.
O'Keeffe's also designed the first square rung ladder with extrusions and the first seismic curtain wall in 1970. The square rung ladder is still the most specified aluminum ladder in the USA, and with O'Keeffe's engineering expertise, we can custom fabricate virtually any type of fixed access, ship, cage or custom ladder you need. We value our in-house research and development, CADD/CAM design, fully integrated manufacturing and an extensive aluminum building products. With 75 years of design, engineering and manufacturing experience, our dedicated staff can assist you from concept to completion.
O'Keeffe's Inc. was the first company to enter the fire rated glazing market and started testing in the USA in 1978. O'Keeffe's continued to be a leading manufacturer of custom skylights until 2004, when the company decided to channel all its energy and focus on its innovative spirit to manufacturing and developing advanced fire rated glass and framing systems through SAFTI FIRST while it continues to advance the architectural ladders division through O'Keeffe's Inc.
Today, O'Keeffe's Inc./SAFTI FIRST continues to proudly serve the architectural and building community by providing quality, well designed USA-made products with superior customer service and expertise throughout the world.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete items below not required for project.
 
A.
Aluminum access ladders.
B.
Aluminum ship's ladders.
C.
Aluminum cage ladders.
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
A.
Section 05 50 00 - Metal Fabrications.
B.
Section 14 20 00 - Elevators.
C.
Section 23 05 00 - Common Work Results for HVAC.
1.3
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
AA - Aluminum Association.
B.
ASTM B 209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.
C.
ASTM B 221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes.
D.
OSHA 1910.27 - Fixed Ladders.
1.4
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
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.
C.
Shop Drawings:
1.
Detail fabrication and erection of each ladder indicated. Include plans, elevations, sections, and details of metal fabrications and their connections.
2.
Provide templates for anchors and bolts specified for installation under other Sections.
3.
Provide reaction loads for each hanger and bracket.
D.
Qualification Data:
1.
Refer to Quality Assurance provisions for submittal requirements evidencing experience, certifications and resources.
E.
Verification Samples: For each finish product specified, two samples, minimum size 6 inches (150 mm) square representing actual product, color, and patterns.
1.5
QUALITY ASSURANCE
A.
Manufacturer Qualifications: A firm experienced in producing aluminum metal ladders similar to those indicated for this Project.
1.
Record of successful in-service performance.
2.
Sufficient production capacity to produce required units.
3.
Professional engineering competent in design and structural analysis to fabricate ladders in compliance with industry standards and local codes.
B.
Installer Qualifications: Competent and experienced firm capable of selecting fasteners and installing ladders to attain designed operational and structural performance.
C.
Product Qualification: Product design shall comply with OSHA 1910.27 minimum standards for ladders.
 
** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
 
D.
Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
1.
Install ladder in area designated by Architect.
2.
Do not proceed with remaining work until workmanship and installation are approved by Architect.
3.
Rework mock-up as required to produce acceptable work.
1.6
PRE-INSTALLATION MEETINGS
A.
Convene minimum two weeks prior to starting work of this section.
1.7
DELIVERY, STORAGE, AND HANDLING
A.
Deliver and store products in manufacturer's unopened packaging bearing the brand name and manufacturer's identification until ready for installation.
B.
Handling: Handle materials to avoid damage.
1.8
PROJECT CONDITIONS
A.
Field Measurements: Verify dimensions by field measurement before fabrication.
1.
Established Dimensions: Where field measurements cannot be made without delaying the Work, indicate established dimensions on shop drawing submittal and proceed with fabrication.
1.9
SEQUENCING
A.
Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.
1.10
WARRANTY
A.
Manufacturer has responsibility for an extended Corrective Period for work of this Section for a period of 5 years commencing on the shipment date of the product against all the conditions indicated below, and when notified in writing from Owner, manufacturer shall promptly and without inconvenience and cost to Owner correct said deficiencies.
1.
Defects in materials and workmanship.
2.
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.
3.
Within the warranty period, the manufacturer shall, at its option, repair, replace, or refund the purchase price of defective ladder.
B.
Manufacturer shall be notified immediately of defective products, and be given a reasonable opportunity to inspect the goods prior to return. Manufacturer will not assume responsibility, or compensation, for unauthorized repairs or labor. 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.
1.11
EXTRA MATERIALS
A.
Furnish touchup kit for each type and color of paint finish provided.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: O’Keefe’s Inc.; 100 N. Hill Dr. Suite 12, Brisbane, CA 94005. ASD. Toll Free Tel: (888)-653-3333. Tel: (415) 822-4222. Fax: (415) 822-5222.
 
** 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 01 60 00 - Product Requirements.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
2.2
LADDERS - GENERAL
A.
Performance:
1.
Provide ladders with performance requirements specified and complying with OSHA referenced standard for safety.
2.
Material: Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
3.
Capacity: Rungs shall withstand a 1,500 pound (454 kg) load without deformation or failure.
 
** NOTE TO SPECIFIER ** Delete Fixed Ladder Bottom Bracket not required.
 
4.
Fixed Ladder Bottom Bracket: Bottom floor supported bracket.
5.
Fixed Ladder Bottom Bracket: Bottom wall supported bracket.
6.
Fixed Ladder Bottom Bracket: Bracket as drawn.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
B.
Fixed and Cage Ladder Design:
1.
Safety cages are required on ladders over 24 feet (7315 mm)
2.
Safety cages are required on all ladders in high or hazardous areas.
3.
Landing platforms are required at 50 feet (15,240 mm) above the bottom of the ladder.
4.
Rail and harness fall arrest system as alternate to safety cage and landing platforms shall be a permissible manufacturer's option.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
2.3
FIXED ACCESS LADDERS
 
** NOTE TO SPECIFIER ** Features and Benefits
Standard duty ladder that provides low-cost roof or mezzanine access.
Lightweight and maintenence-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for additional cost.
Delete if not required.
 
A.
Standard Duty Channel Rail Fixed Access Ladder:
1.
Product: Model 500 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Heavy duty ladder that provides low-cost roof or mezzanine access.
Recommended for heights over 15 feet or when a Security Door is required.
Lightweight and maintenence-free aluminum construction
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting
Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for additional cost.
Delete if not required.
 
B.
Heavy Duty Tubular Rail Fixed Access Ladder:
1.
Product: Model 501 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy access to a flat or low parapet roof.
Lightweight and maintenence-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for additional cost.
Delete if not required.
 
C.
Tubular Rail Low Parapet Access Ladder with Roofover Rail Extensions:
1.
Product: Model 502 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy ladder-to-roof access over high parapets
Lightweight and maintenence-free aluminum construction
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for additional cost.
Delete if not required.
 
D.
Tubular Rail High Parapet Access Ladder with Platform and Return:
1.
Product: Model 503 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy ladder-to-roof access to a flat or low parapet roof.
Lightweight and maintenence-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for additional cost.
Delete if not required.
 
E.
Tubular Rail Low Parapet Access Ladder with Platform Only
1.
Product: Model 503A as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy ladder-to-roof access to a flat or low parapet roof.
Lightweight and maintenence-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor
Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for additional cost.
Delete if not required.
 
F.
Tubular Rail Low Parapet Access Ladder with Walk Through Rail Extensions
1.
Product: Model 504 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
2.4
SHIP LADDERS
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy roof or mezzanine access.
Available 60 degrees and 75 degrees standard angles. Other angles and custom designs are available upon request.
Provides easy ladder to roof access to a flat or low parapet roof.
Lightweight and maintenance-free aluminum construction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Standard floor mounted bracket included. Options for seismic bracket also available.
Rungs capable of withstanding 1,500 lb. load.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
A.
Ship Ladder:
1.
Product: Model 520 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Delete incline not required.
 
2.
Incline: 60 degree.
3.
Incline: 75 degree.
4.
Incline: As drawn.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy roof or mezzanine access.
Available 60 degrees and 75 degrees standard angles. Other angles and custom designs are available upon request. Provides easy ladder to roof access to a flat or low parapet roof.
Lightweight and maintenence-free aluminum construction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Standard floor mounted bracket included. Options for seismic bracket also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
B.
Ship Ladder with Platform:
1.
Product: Model 521 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Delete incline not required.
 
2.
Incline: 60 degree.
3.
Incline: 75 degree.
4.
Incline: As drawn.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy roof to roof or crossover access over pipes, ducts, equipment, etc.
Available 60 degrees and 75 degrees standard angles. Other angles and custom designs are available upon request. Provides easy ladder to roof access to a flat or low parapet roof.
Lightweight and maintenence-free aluminum construction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Standard floor mounted bracket included. Options for seismic bracket also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
C.
Ship Ladder with Platform and Return
1.
Product: Model 522 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Delete incline not required.
 
2.
Incline: 60 degree.
3.
Incline: 75 degree.
4.
Incline: As drawn.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy access to interior roof or floor hatch.
Available 60 degrees and 75 degrees standard angles. Other angles and custom designs are available upon request. Provides easy ladder to roof access to a flat or low parapet roof.
Lightweight and maintenance-free aluminum construction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Standard floor mounted bracket included. Options for seismic bracket also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
30" x 54" roof hatch by O'Keeffe's also available.
Delete if not required.
 
D.
Ship Ladder with Access to Roof Hatch:
1.
Product: Model 523 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Delete incline not required.
 
2.
Incline: 60 degree.
3.
Incline: 75 degree.
4.
Incline: As drawn.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
2.5
CAGE LADDERS
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy roof and mezzanine access.
Recommended for use in high or hazardous locations such as areas in close proximity to the roof edge or high-voltage power lines.
Lightweight and maintenance-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
A.
Cage Ladder with Roof Hatch Rail Extension
1.
Product: Model 531 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy access to a flat or low parapet roof.
Recommended for use in high or hazardous locations such as areas in close proximity to the roof edge or high-voltage power lines.
Lightweight and maintenence-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
B.
Low Parapet Access with Roofover Rail Extensions:
1.
Product: Model 532 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy ladder to roof access over high parapets.
Recommended for use in high or hazardous locations such as areas in close proximity to the roof edge or high-voltage power lines.
Lightweight and maintenence-free aluminum construction
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
C.
High Parapet Access with Platform and Return:
1.
Product: Model 533 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy ladder to roof access to a flat or low parapet roof.
Recommended for use in high or hazardous locations such as areas in close proximity to the roof edge or high-voltage power lines.
Lightweight and maintenence-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
D.
Low Parapet Access with Platform and No Return:
1.
Product: Model 533A as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Features and Benefits
Provides easy ladder to roof access to a flat or low parapet roof.
Recommended for use in high or hazardous locations such as areas in close proximity to the roof edge or high-voltage power lines.
Lightweight and maintenence-free aluminum construction.
1-1/4" patented deeply serrated square rungs for maximum grip and foot traction.
Non-spark, high strength 6061-T6 allow rungs and 6063-T5 alloy extrusions.
Rungs capable of withstanding 1,500 lb. load.
Standard floor mounted bracket included. Options for Off-floor Mounting Bracket with 7" backset also available.
Comes with standard mill finish but can be anodized or powder coated to any color or finish specified for an additional cost.
Delete if not required.
 
E.
Tubular Rail Low Parapet Cage Ladder with Walk-through Extension:
1.
Product: Model 534 as manufactured by O'Keeffe's Inc.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
2.6
CUSTOM LADDERS
 
** NOTE TO SPECIFIER ** O'Keeffe's can custom fabricate any ladder, platform, catwalk, etc. that you need. If you need assistance for a current or upcoming project, please contact Jack Huff at jackh@okeeffes.com or 209.386.1653.
With 75 years of design, engineering and manufacturing experience, our dedicated team can assist you from concept to completion.
 
A.
Provide ladders as indicated on Drawings complying with performance requirements and complying with OSHA referenced standard for safety.
1.
Product: Custom design and engineering as manufactured by O'Keeffe's Inc.
2.7
FlNlSHES
 
** NOTE TO SPECIFIER ** Delete finishes not required.
 
A.
Mill finish. As extruded.
B.
Clear Anodic Finish: AA-M10C22A41 Mechanical finish as fabricated. Architectural Class I, clear coating 0.018 mm or thicker.
C.
Paint. Urethane over chemically pretreated substrate.
 
** NOTE TO SPECIFIER ** Delete color not required.
 
1.
Color: Fire Red (RAL 2002).
2.
Color: Alert Orange (RAL 2003).
3.
Color: Warning Blue (RAL 5005).
4.
Color: Caution Yellow (RAL 1018).
5.
Color: Safety Green (RAL 6001).
6.
Color: As scheduled on drawings.
2.8
MATERIALS
A.
Aluminum Sheet: Alloy 5005-H34 to comply with ASTM B209.
B.
Aluminum Extrusions: Alloy 6063-T6 to comply with ASTM B221.
2.9
FABRICATION
 
** NOTE TO SPECIFIER ** Delete fabrication not required for ladder type specified.
 
A.
Rungs: Not less than 1-1/4 inches (32 mm) in section and 18- 3/8 inches (467mm) long, formed from tubular aluminum extrusions. Squared and deeply serrated on all sides.
1.
Rungs shall withstand a 1,500 pound (454 kg) load without deformation or failure.
B.
Channel Side Rails: Not less than 1/8 inch (3 mm) wall thickness by 3 inches (76 mm) wide.
C.
Heavy Duty Tubular Side Rails: Assembled from two interlocking aluminum extrusions no less than 1/8 inch (3 mm) wall thickness by 3 inches (76 mm) wide. Construction shall be self-locking stainless steel fasteners, full penetration TIG welds and clean, smooth and burr-free surfaces.
D.
Ship Ladders: Not less than 1-1/4 inches (32mm) high, 4-1/8 inch (105 mm) deep and 2 feet (610 mm) wide; tread spacing shall be 1 foot (305 mm) on center. Handrails shall be aluminum pipe, not less than 1-1/2 inches (38 mm) in diameter with hemispheric end caps.
E.
Walk-Through Rail and Roof Rail Extension: Not less than 3 feet 6 inches (1067 mm) above the landing and shall be fitted with deeply serrated, square, tubular grab rails.
F.
Landing Platform: 1-1/2 inches (38 mm) or greater diameter, tubular aluminum guardrails and decks of serrated aluminum treads.
G.
Security Doors: Formed 1/8 inch (3 mm) thick aluminum sheet. Security panels shall extend on both sides, perpendicular to the door face, to within 2 inches (51 mm) of the wall. Security door shall be furnished with continuous aluminum piano hinge and heavy duty forged steel locking hasps.
H.
Ship Ladder Seismic Bottom Support: Manufacturer's standard; two isolation bearings per stringer.
I.
Ladder Safety Post: Retractable hand hold and tie off.
J.
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.
K.
Safety Cages:
1.
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.
2.
Safety cage hoops and vertical bars: 3/16 inch (5 mm) by 2 inches (51 mm) aluminum bar.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Coordinate anchorages. Furnish setting drawings, templates, and anchorage structural loads for fastener resistance.
B.
Do not begin installation until supporting structure is complete and ladder installation will not interfere with supporting structure work.
C.
If supporting structure is the responsibility of another installer, notify Architect of unsatisfactory supporting work before proceeding.
3.2
PREPARATION
A.
Clean surfaces thoroughly prior to installation.
B.
Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
3.3
INSTALLATION
A.
Install in accordance with manufacturer's instructions and in proper relationship with adjacent construction.
3.4
PROTECTION
A.
Protect installed products until completion of project.
B.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION
 
 
In the interest of continuous improvement of its product line, O'Keeffe's reserves the right to modify its products' composition, colors, textures, sizes, and other physical and performance attributes and these guide specifications at any time. O'Keeffe's makes no expressed or implied warranties regarding content, errors, or omissions in the information presented. Specifications modified or rewritten not in conformance with manufacturer's standard processes, products, and procedures may void warranties and related remedies.