A19-11 24 26 Safety Tie Backs.pdf

Construct New Inpatient Pharmacy Project #: 689-411

Safety Tie-Backs

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SECTION 11 24 26

SAFETY TIE-BACKS

PART 1 - GENERAL

1.1 SUMMARY

A. Furnish labor, materials, tools, equipment, and services for Safety Tie-Backs, as indicated, in accordance with provisions of Contract Documents.

B. Completely coordinate with work of other trades.

1.2 DESCRIPTION

A. Description of system:

1. Design, fabrication, and installation of safety tie-backs anchored to roof structure for purpose of general building maintenance including:

a. Single eye safety tiebacks.

b. Signage indicating safe usage and restrictions.

c. Instructional materials.

2. Design and locate anchors to provide accessibility to windows for purpose of cleaning, building maintenance, or both, with conventionally rigged window washing equipment.

1.3 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. Manufacturer minimum five (5) years experience in design, fabrication and installation of similar size and scope systems.

2. Manufacturer to carry specific liability insurance for products and completed systems in amount of $10,000,000.00 to protect against product and system failure.

B. Installer Qualifications:

1. Installer minimum five (5) years experience in installation of similar systems, or approved by manufacturer.

2. Welding to be executed by certified welders in accordance with AWS requirements.

C. Occupational Safety and Health Administration (OSHA):

1. 1910, Subpart D Walking and Working Surfaces

2. Appendix C to 1910 Subpart F Personal Fall Arrest Systems

3. OSHA Ruling on Window Cleaning by Boatswain's Chair.

4. 1910.66, Subpart F Powered Platforms

D. New York State regulations:

1. Department of Labor Advisory Standard 101 - Construction, Operation and Maintenance of Suspended Scaffolds Used for Window Cleaning and Light Maintenance.

2. Advisory Standard 111 - Hoisting Machines Used for Suspended Scaffolds.

3. Department of Labor Industrial Code Rule 21 - Protection of Persons Employed at

Window Cleaning – Structural Requirements, Equipment and Procedures.

E. American Institute of Steel Construction (AISC):

1. AISC S342L-1993, with Supplements Load and Resistance Factor Design Specification for Structural Steel Buildings.

2. AISC Manual of Steel Construction, Allowable Stress Design.

F. Aluminum Association (AA):

1. AA ADM-1 Aluminum Design Manual; Aluminum Association

G. American Welding Society (AWS):

1. AWS D1.1-2000 Structural Welding Code - Steel.

2. AWS D1.2-2000 Structural Welding Code - Aluminum.

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H. American National Standards Institute (ANSI)/International Window Cleaning Association

(IWCA):

1. ANSI/IWCA I-14.1Window Cleaning Safety Standard

I. American Society of Mechanical Engineers:

1. ASME A120.1Safety Requirements for Powered Platforms for Building Maintenance

1.4 SUBMITTALS

A. Shop Drawings:

1. Showing anchorage locations and details.

B. Project Information:

1. Manufacturer's installation instructions and recommendations.

2. Manufacturer Certificate of liability insurance.

C. Contract Closeout Information:

1. Structural calculations for safety tie backs indicating design conforms to specified design criteria, sealed by the Specialty Structural Engineer.

a. Submit concurrent with Shop Drawings.

2. Operating Procedures Outline:

a. Include elements in both pictorial and written form to instruct employees in safe use of roof supported building maintenance equipment and window cleaning procedures.

3. Warranty.

1.5 WARRANTY

A. Manufacturer five (5) year warranty against failure and replacement of components.

B. Submit all labor and materials furnished to terms of "Warranty of Construction" articles of FAR clause 52.246-21. The One-Year Warranty and Guarantee Period of Service shall commence and run concurrent after final inspection, completion of performance test, and upon acceptance of pneumatic tube system.

C. During warranty period if a device is not functioning properly in accordance with specification requirements, requiring more maintenance than is typical required to keep device operational, device shall be removed and a new device meeting all requirements shall be installed as part of work under this contract until satisfactory operation of installation is obtained – at no point will such warranty work result in additional cost to the government. Period of warranty shall start anew for such parts from date of completion of each new installation performed, in accordance with foregoing requirements.

PART 2 - PRODUCTS

2.1 DESIGN CRITERIA

A. Provide Safety Tie-Backs engineered to support dead, live, and lateral (wind or seismic) loads indicated.

1. Include headers and reinforcing members around openings.

2. Required details defining method of fastening throughout system and attachments to supporting primary structure included in engineering requirement.

B. Design system to support 5000 LBS minimum load applied to each anchor.

1. Compatible with current window washing practices and standards.

2. Locations shown on Drawings are conceptual.

3. Actual locations are to be determined by designer of system.

2.2 MATERIALS

A. Design roof anchorage system including locations and details required to meet listed codes and requirements.

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B. Locations shown on Drawings are conceptual.

C. Actual locations as determined by equipment supplier in Shop Drawings, but shall comply with following:

1. Locate anchors with direct attachment to structural concrete or steel members.

a. Through-slab connections not allowed.

2. Proposed locations are subject to final approval by Architect.

D. Standards for components:

1. Exposed structural stainless steel: Type 304, with a yield strength of 42 KSI.

2. Non-Exposed structural components: ATSM A36, Type 350W with yield strength of 50

KSI for Hollow Structural Steel and 42 KSI for Plate Steel and other sections.

3. Galvanizing: ASTM A123.

4. Cold-Rolled Sections: ASTM A500 with yield strength of 55 KSI.

5. Fastening devices: ASTM A325 or Type 304 stainless steel.

E. Provide anchorage components fabricated of materials compatible with substrates to which welded or otherwise attached.

F. Flashing and Counterflashing:

1. Specified in Section 07 54 23 & 07 60 00.

PART 3 - EXECUTION

3.1 INSPECTION

A. Correct unsatisfactory conditions.

B. Start of work constitutes acceptance of conditions and responsibility for performance.

3.2 INSTALLATION / ERECTION

A. Install components required to be attached to or connected with structure.

B. Coordinate as required.

C. Install in accord with manufacturer's instructions and approved shop drawings.

D. No through-wall style anchors may be used unless approved by Architect.

E. Install top of safety tie-back at 6 IN minimum above adjacent roofing height, taking into account insulation thickness at each tie-back location.

F. Flashing:

1. Specified in Section 07 54 23 & 07 60 00.

G. Where contact is made between dissimilar materials, protect to prevent corrosion.

H. Coordinate components indicated to be installed on other affected building components with those supplier, installers, or both.

I. Retouch damaged galvanizing.

J. Design components for attachment directly to structural steel members.

3.3 FIELD QUALITY CONTROL

A. Check welds to structure.

B. Verify water integrity of flashings, with roofer.

END OF SECTION

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11 24 26 - Safety Tie-Backs