07700 Access Hatches.pdf

Standard Drawings for Doppler (VHF)

Omni Directional Range (DVOR) Counterpoise June 2020

ACCESS HATCHES 07700 - 1

SECTION 07700

ACCESS HATCHES

PART 1 - GENERAL

1.1 WORK INCLUDED

Furnish labor, materials, equipment and incidentals necessary to install a double door access hatch indicated in drawings and specified herein.

1.2 RELATED WORK COVERED ELSEWHERE

Structural Steel Section 05120

Structural Steel Erections Section 05121

Miscellaneous Metals Section 05500

Painting Section 09901

1.3 SUBMITTALS

Submittals shall be in accordance with general requirements and shall include:

A. Shop Drawings: Indicate configuration and dimension of components, adjacent construction, required clearances and tolerances, and other affected Work.

i. Hatch Units: Show types, elevations, thickness of metals, and full size profiles.

ii. Hardware: Show materials, finishes, locations of fasteners, types of fasteners, locations and types of operating hardware, and details of installation.

iii. General: Show connections of units and hardware to other Work. Include schedules showing location of each type and size of unit.

B. Product Data: Manufacturer’s technical data for each type of hatch assembly, including setting drawings, templates, finish requirements, and details of anchorage devices.

iv. Include complete schedule, types, locations, construction details, finishes, latching or locking provisions, and other pertinent data.

C. Manufacturer's Installation Instructions: Indicate installation requirements and rough-in dimensions.

D. Quality Control Submittals:

v. Statement of qualifications.

E. Contract Closeout Submittals.

vi. Operating and maintenance manuals.

1.4 QUALITY ASSURANCE

A. Qualifications:

Manufacturer/Installer: Company specializing in manufacturing and installation of components specified in this Section with minimum of 5 years documented experience.

1.5 DELIVERY HANDLING AND STORAGE

A. Deliver materials to Project site ready use.

B. Exercise proper care in handling of Work so as not to injure finished surfaces. Protect Work from damage after it is in place.

ACCESS HATCHES 07700 - 2

C. Store materials under cover in a dry and clean location off the ground. Remove materials that are damaged or otherwise not suitable for installation from Project site and replace with acceptable materials at no additional cost to Owner.

1.6 WARRANTY

A. Provide manufacturer's written 5-year warranty.

B. Warrant materials and workmanship against defects after completion and final acceptance of Work.

PART 2 – PRODUCTS

2.1 SUGGESTED MANUFACTURERS: Access hatches by the following Manufacturers that comply with these specifications will be acceptable.

1. The Bilco Company

2. Babcock Davis, Inc.

3. Acudor Products, Inc.

4. JL Industries, Inc.

ACCESS HATCH

2.2

A Furnish and install where indicated on plans a metal access hatch for a clear opening size of 3’-6”

(width) x 7’-6” (length). Length denotes hinge side. The access hatch shall be double leaf. The access hatch shall be preassembled from the manufacturer.

B Performance characteristics

i. Covers shall be reinforced to support a minimum live load of 60 psf with a maximum deflection of 1/150th of the span or 20 psf wind uplift

ii. Operation of the covers shall be smooth and easy with controlled operation throughout the entire arc of opening and closing.

iii. Operation of the covers shall not be affected by temperature

iv. Fully welded corner joints on covers and curb.

C. Lifting mechanisms: Manufacturer shall furnish hinge mechanisms that provide smooth, easy, and controlled cover operation throughout the entire arc of opening and closing.

D. Hardware

i. Heavy pintle hinges shall be provided

ii. Covers shall be equipped with an enclosed two point spring latch with interior and exterior turn handles.

iii. Access hatch shall be equipped with interior padlock hasps on the underside of panels such that a padlock can be used to lock the opening closed.

iv. The latch strike shall be a stamped component bolted to the curb assembly.

v. Covers shall automatically lock in the open position with a rigid hold open arm equipped with a 1” (25.4mm) diameter red vinyl grip handle to permit easy release for closing.

vi. Each leaf (interior/underside) should have an ADA compliant (strength/dimensions) aluminum handrail attached to it and a sliding bar lock such that the leaf can be locked in the vertical position so that the handrail can be used for moving up and down the stairs.

vii. Compression spring tubes shall be an anti-corrosive composite material and all other hardware shall be zinc plated and chromate sealed.

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E. Finishes: Factory finish shall be alkyd based red oxide primed steel

2.3 FINISHES

A. General: Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Steel: Manufacturer's standard factory-applied powder coat finish, red oxide standard color.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verification of Conditions: Examine areas and conditions under which Work is to be performed and identify conditions detrimental to proper or timely completion.

B. Verify that top level deck steel elements, expanded metal grating, and other items affecting Work of this Section are in place and positioned correctly.

C. Verify tolerances and correct improper conditions.

D. Do not proceed until unsatisfactory conditions have been corrected.

3.2 INSTALLATION

A. Submit product design drawings for review and approval to the owner before fabrication.

B. Install roof accessory items and components per manufacturer's instructions.

C. Coordinate installation of components of this Section with installation of top level deck and top level steel elements.

D. Separate metal from incompatible metal or corrosive substrates, including wood, by coating concealed surfaces, at locations of contact, with bituminous coating or providing other permanent separation.

E. The installer shall furnish mechanical fasteners consistent with the access hatch requirements.

3.3 ADJUSTING

A. Adjust movable parts for smooth operation.

B. Operational Units: Test-operate units with operable components. Clean and lubricate joints and hardware. Adjust for proper operation.

3.4 CLEANING

A. Clean exposed surfaces per manufacturer's written instructions. Touch up damaged metal coatings.

END OF SECTION