VGT Variable-Pitch Girder Tiedown
Girder Tiedowns for Plated Truss
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Product Details
The VGT is a girder tiedown for moderate- to high-load applications with girder trusses. This variable tiedown is designed for installation on the side of a truss, and it attaches with Strong-Drive® SDS Heavy-Duty Connector screws. The VGT can be bolted down into place in combination with a holdown or bolted directly to the foundation.
Key Features
- Suitable for retrofit applications
- Available with one flange concealed for attachment to trusses with no tail
- Load rated to resist high-wind forces
Material
- 7 gauge
Finish
- Galvanized
Installation
- Strong-Drive SDS Heavy-Duty Connector screws included
- The product can be installed in a single application or in pairs to achieve a higher uplift capacity
- Can be installed on roof pitches up to 8/12 or on a bottom chord designed to transfer the load
- Screw holes are configured to allow for double installation on a two-ply (minimum) truss
- When installing on trusses with no overhangs, specify VGTR/L
- Install washer component (provided) so top of washer is horizontal and parallel with top plate of wall
Patent Information
- US Patent 7,707,785
Related Literature
Product Information Table
| Model No. | Ga. | W (in.) | H (in.) | CL (in.) | Coating/Material | Product Includes | Packaging Qty. |
|---|---|---|---|---|---|---|---|
| VGT | 7 | 8 1/2 | 4 1/4 | 1 7/8 | Zinc Galvanized, G90 | (16) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) predeflected crescent washer | 1 |
| VGTL | 7 | 8 1/2 | 4 1/4 | 1 7/8 | Zinc Galvanized, G90 | (16) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) predeflected crescent washer | 1 |
| VGTR | 7 | 8 1/2 | 4 1/4 | 1 7/8 | Zinc Galvanized, G90 | (16) 1/4 in. x 3 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) predeflected crescent washer | 1 |
Load Tables
- Allowable loads have been increased for wind or earthquake loading with no further increase allowed. Reduce where other loads govern.
- To achieve the loads listed for the VGT single- and double-connector options, anchorage into a 8" wide concrete tie-beam or grouted and reinforced CMU bond beam can be made using SET-3G, ET-3G™, or AT-3G™ anchoring adhesive with a minimum embedment depth of 12", with a minimum end distance of 12", and centered in the 8" member. Vertical reinforcement may be required to transfer the loads per designer. Alternate anchorage solutions may be determined by designer.
- Concrete shall have a minimum compressive strength of f'c = 2,500 psi.
- Grout-filled CMU (GFCMU) shall have a minimum compressive strength of f'm = 1,500 psi.
- Strong-Drive SDS Heavy-Duty Connector screws may be installed through metal truss plates as approved by the truss designer, provided the requirements of ANSI/TPI 1-2014, Sections 7.5.3.4 and 8.9.2 are met (predrilling required through the plate using a 5/32" bit maximum).
- Fasteners: SDS screws are Simpson Strong-Tie® Strong-Drive screws. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
