LGT/MGT/VGT/HGT Girder Tiedowns

The LGT, MGT, VGT and HGT are girder tiedowns for moderate to high load capacity applications. The LGT and VGT are also suitable for retrofit applications.

LGT connectors provide a low profile connection to the studs for easy installation of drywall. Simple to install and can be installed on the inside or outside of the wall. LGT connectors also provide exceptional bearing enhancement for heavy download applications. The LGT series has been extended to include the new LGT4-SDS3 for 4-ply girders.

The Variable Girder Tiedown (VGT) is a higher capacity alternative to the LGT and MGT for girder trusses. It attaches with Simpson Strong-Tie® Strong-Drive® SDS Heavy-Duty Connector screws to the side of truss and features a predeflected crescent washer that allows it to accommodate top chord pitches up to 8/12. The VGT is also available with one flange concealed for attachment to trusses with no tail.

The HGT offers the highest uplift capacity for girders and can be installed on trusses and beams with top chord slopes up to 8/12.

Material

HGT, VGT-7 gauge, LGT2-14 gauge, MGT, LGT3, LGT4-12 gauge.

Finish

HGT-Simpson Strong-Tie® gray paint; LGT, MGT, VGT-Galvanized

Installation

• When the HGT-3 is used with a 2-ply girder or beam, shimming is required. Fasten to act as one unit.
• Before installing fasteners, ensure LGT3-SDS2.5 makes complete contact with bottom of truss.
• SDS screws included with LGT3, LGT4 and VGT Series.
• VGT—Can be installed on roof pitches up to 8/12 or on a bottom chord designed to transfer the load.
• VGT—Screw holes are configured to allow for double installation on a two-ply (minimum) truss.
• VGT—The product can be installed in a single application or in pairs to achieve a higher uplift capacity.
• VGT—When installed on trusses with no overhangs, specify VGTR/L.
• VGT—Install washer component (provided) so that top of washer is horizontal as well as parallel with top of wall top plate.
• LGT3-SDS2.5—The four large hexagon holes are intended for CMU and concrete applications.
• For masonry applications, see MGT/HGT in Masonry Connectors.
• View step-by-step installation instructions in the Installer's Pocket Guide (S-C-INSTALL).

Options

LGT3 and LGT4 are available with reduced widths of W = 4 3/4" and W = 6 5/16" – order as LGT3N-SDS2.5 and LGT4N-SDS3.

Related Links

• Wood Construction Connectors Technical and Installation Notes
• General Notes
• MGT/HGT girder tiedowns.

Related Literature

Wood Construction Connectors Catalog 2015-2016

C-C-2015

Complete product and application information as well as load tables and installation information for over 3,000 wood-to wood, wood-to concrete and wood-to-masonry connectors.

Catalog

• 
  Conectores Metálicos Estructurales 2013-2015

  C-2013SP

  Información completa de productos, de la aplicación, de las tablas de cargas y de la instalación, para conectores Simpson Strong-Tie® de madera a madera, madera a concreto y concreto a mampostería.

  Catalog
• 
  Cold-Formed Steel Connectors Catalog

  C-CFS-15

  Product information, specifications, load tables and installation illustrations for our cold-formed steel connectors and clips for commercial curtain-wall, mid-rise and residential construction.

  Catalog
• 
  High Wind-Resistant Construction Application Guide

  F-C-HWRCAG16

  The newly updated High Wind-Resistant Construction Application Guide offers new applications, updated loads, as well as more fastening information that is used to resist high-wind.

  Product Guide
• 
  Installer's Pocket Guide

  S-C-INSTALL16

  S-C-INSTALL16 is a guide featuring updated products, new color illustrations and easier navigation. Some popular structural fastening and anchoring products have also been added.

  Installation Guide
• 
  Companion for the 2001 AF&PA Wood-Frame Construction Manual for Wind Design

  T-01WFCM08

  The T-01WFCM08 is a 24-page technical bulletin designed to be used in conjunction with the 2001 edition of the Wood Frame Construction Manual.

  Technical Bulletin
• 
  Hurricane Ties Used For Truss Bearing Enhancement

  T-C-HTIEBEAR16

  A guide providing allowable downloads of our hurricane ties when used from truss-bearing enhancement. It includes allowable loads for connectors and for the connectors and wood combined.

  Technical Bulletin
• 
  Uplift Connectors Truss-to-Wall Tiedowns (Spruce-Pine-Fir)

  T-C-UPLIFTSPF16

  A one-page, double-sided technical bulletin providing allowable loads and fastening requirements for when a wood truss is supported by a Spruce-Pine-Fir or Hem Fir double top plate.

  Technical Bulletin
• Show 5 More
  Show Less

Load Tables

Typical LGT2 Installation

Typical LGT3-SDS2.5 Installation

1. Allowable loads have been increased for wind or earthquake loading; no further increase allowed; reduce where other loads govern.
2. LGT2—F₁ load = 700 lbs., F₂ load = 170 lbs. with installation of 4-16d sinkers optional nail holes.
3. LGT3—F₁ load = 795 lbs., F₂ load = 410 lbs.
4. LGT4—F₁ load = 2000 lbs, F₂ load = 675 lbs. with installation of 7 - 16d sinkers in optional nail holes.
5. LGT4—Uplift for DF/SP girder and SPF studs is 3860 lbs.
6. MGT can be installed with straps vertical for full table load provided all specified nails are installed to either a solid header or minimum double 2x6 web.
7. LGT connectors can provide bearing enhancement loads for truss download reactions. The DF/SP allowable load shall be 2060 lbs. for LGT2 and 4100 lbs. for LGT3 and LGT4 (for SPF/HF values use a 0.68 multiplier).
   For more information refer to technical bulletin T-HTIEBEARING .
8. Girder tiedowns installed on the outside of the wall require a 3 1/2" overhang to achieve table loads.
9. Simpson Strong-Tie® Strong-Drive® screws are permitted to be installed through metal truss plates as approved by the Truss Designer, provided the requirements of ANSI/TPI 1-2007 Sections 7.5.3.4 and 8.9.2 are met (pre-drilling required through the plate using a maximum of 5/32" bit).
   
10. NAILS: 16d Sinker = 0.148" dia. x 3 1/4" long, 10d = 0.148" dia. x 3" long. See other nail sizes and information.

Code Reports