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VERTICAL LIFT STRAP BIFOLD HANGAR / HYDRAULIC "ONE-PIECE" DOORS |
1. QUANTITY |
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1.1 |
Doors for this project will consist of (___) bifold / hydraulic One-Piece® doors |
2. SIZE OF DOOR - Clear Open Width & Height |
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2.1 Hanger door with door in up position, shall have a minimum clear opening width of (___'____") as shown in the plans
and a minimum clear height of (___'____") above finished floor elevation.
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3. PLACEMENT of the Bifold / Hydraulic Doors onto the building - Choose One |
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3.1 |
Door shall be mounted on the exterior walls of building. |
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3.2 |
Door shall be mounted flush with exterior walls of building. |
4. GENERAL / CONTRACTORS REQUIREMENTS: - DESIGN CRITERIA |
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4.1 |
The bifold hangar / One-Piece® hydraulic doors shall be designed to the same loading requirements for live, dead and windloads as the hangar building. |
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4.2 |
The doors shall be engineered to resist all anticipated loads without sagging, bowing or conflicting with its smooth and efficient operation. |
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4.3 |
Design for windload as required by UBC, 2000 International Building Code & 1999 Standard Building Code (ASCE 7-98). (Example) Windload (___) mph. Exposure (___). |
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4.4 |
The design shall be furnished, approved and sealed by a professional engineer registered in the state where the project is located. |
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4.5 |
The building header shall be designed to accommodate horizontal and vertical building deflections to support the bifold / One-Piece® hydraulic door in all positions (with the proper lateral bracing)
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4.6 |
The building's door columns shall be framed of the proper design and size to reinforce the opening (with lateral bracing) and to carry all loads and vibrations
imposed thereon.
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4.7 |
The bifold / One-Piece® hydraulic door should have solid footing with sill directly underneath the doorframe and extending outward from the door to provide a base for the door's weather seal. This also prevents flow of water into, or under, the door installation.
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4.8 |
The finished floor of the building should be designed to prevent flow of water under the door installation. Sills shall have a slight slope outward of the bifold / One-Piece® hydraulic door to prevent water flow under the door installation.
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5. GENERAL / ELECTRICAL REQUIREMENTS: |
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5.1 |
The building contractor shall furnish and install a prewired electrical door operating mechanism to control each bifold / One-Piece® hydraulic door.
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5.2 |
The contractor is responsible and required to completely install the prewired electrical door operating mechanism, push button controls, devices and electrical conduit and wiring to the door operating controls.
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5.3 |
Control panel with up/down/off switch pre-wired to motor, and override controls with the required number of adequately sized insulated electrical conductors.
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6. GENERAL / Electric Power Operator: For the Bifold / Hydraulic Doors |
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6.1 |
All electrical controls and devices shall conform to the requirements of the current National Electrical Code 513, NEMA, and be UL approved.
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6.2 |
The operator is furnished complete details, consisting of a motor and factory-wired control panels consisting of main-fused disconnect switch, magnetic reversing starters, limit switches and pushbutton controls, control circuit transformers, relays, timing devices, and warning devices.
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7. LIFTING METHODS - CHOOSE ONE |
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7.1 |
LIFT CABLES |
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A. |
Cables shall be manufacturer's standard adequately sized aircraft galvanized steel type lifting cables and lifting drums
in sufficient amount to give 5:1 safety factor.
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B. |
The lift drums must be properly shielded to avoid any potential hazards to people. |
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7.2 |
LIFT STRAPS |
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A. |
The door power unit shall be operated by a system of lifting straps (NOT CABLES), lifting drums and driveshafts. |
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B. |
The Lift Straps shall have adjustable slack take-up device to keep proper tension on each Lift Strap |
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C. |
The lift drums must be properly shielded to avoid any potential hazards to people. |
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D. |
Lift Straps and Lift Drums shall be manufacturer's standard adequately sized in sufficient amount to give 5:1 safety factor. |
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7.3 |
LIFT CYLINDERS - Hydraulic Doors |
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A. |
The door power unit shall be operated by a system of HYDRAULIC CYLINDERS that raise and lower the hydraulic door. |
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B. |
Hydraulic Lift Cylinders shall be manufacturer's standard adequately sized in sufficient amount to give 5:1 safety factor. |