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LTT/HTT Tension Ties

LTT/HTT

Tension ties offer a solution for resisting tension loads that are fastened with nails. The HTT4 and HTT5 are the latest generation of tension ties. They feature an optimized nailing pattern which results in better performance with less deflection. Designed to meet rigorous code standards, the HTT4 and HTT5 offer higher loads than their predecessors.

HTT5KT is sold as a kit with the holdown, bearing plate washer and Strong-Drive® SD Connector screws. The HTT5-3/4 is designed to use a 3/4"-diameter anchor bolt. 3/4" post-installed anchor bolts are commonly used when retrofitting tension ties to horizontal wood members.

The LTT19 light tension tie is designed for 2x joists or purlins and the LTT20B is for nail- or bolt-on applications. The 3" nail spacing makes the LTT20B suitable for wood I-joists with 10d x 1 1/2". The LTTI31 is designed for wood chord open-web truss attachments to concrete or masonry walls and may also be installed vertically on a minimum 2x6 stud.

Material

  • See table

Finish

  • Galvanized. May be ordered HDG; contact Simpson Strong-Tie.

Installation

  • Use all specified fasteners; see Holdown and Tension Tie General Notes.
  • A standard-cut washer is required for LTT19 and LTT20B when using 1/2" or 5/8" anchor bolts. No additional washer is required when using a 3/4" anchor bolt.

Related Literature

Load Tables

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option, check with Simpson Strong-Tie for details.

   These models are approved for installation with the Strong-Drive® SD Connector screw. See the load values below.

  1. LTTI31 installed flush with concrete or masonry has an allowable load of 2285 lbs.
  2. Allowable load for HTT5 with a BP5/8-2 bearing plate washer installed in the seat of the holdown is 5,295 lb. for DF/SP and 4,555 lb. for SPF/HF.
  3. Fasteners: 10dx1 1/2= 0.148" dia. x 1 1/2" long,
    10d = 0.148" dia. x 3" long,
    16d x 2 1/2= 0.162" dia. x 2 1/2" long,
    SD #10 x 2 1/2 = 0.161" dia. x 2 1/2",
    SD #10 x 1 1/2 = 0.161" dia. x 1 1/2".

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
HTTSee specific model numbers for code listings.
HTT4 ER-102 ER-130 ER-124 RR25818 RR25489 FL11496 FL13872
HTT5 ER-102 ER-130 ER-124 RR25818 RR25489 FL11496 FL13872
HTT5-3/4 ER-102 ER-130 RR25818 FL11496
LTTSee specific model numbers for code listings.
LTT19 ER-102 ER-130 RR25818 FL11496
LTT20B ER-102 ER-130 RR25818 FL11496
LTTI31 ER-102 ER-130 RR25818 FL11496

Drawings

Part Orthographic Perspective
HTTNone
HGT with HTT
DWG DXF
HTT4
HTT4
DWGDXF
HTT4 front view
DWG DXF
HTT4 left view
DWG DXF
HTT4 right view
DWG DXF
HTT4 top view
DWG DXF
High Wind-Resistant Construction D108: Holdowns
DWG DXF
High Wind-Resistant Construction D22: Girder/Truss to Masonry/Concrete
DWG DXF
High Wind-Resistant Construction D72: Wall to Pile/Girder
DWG DXF
High Wind-Resistant Construction D8: Girder/Truss to Wood Wall Framing
DWG DXF
HTT5
HTT5
DWGDXF
HTT5 front view
DWG DXF
HTT5 left view
DWG DXF
HTT5 right view
DWG DXF
HTT5 top view
DWG DXF
High Wind-Resistant Construction D108: Holdowns
DWG DXF
High Wind-Resistant Construction D22: Girder/Truss to Masonry/Concrete
DWG DXF
High Wind-Resistant Construction D58: Header to Wall Framing
DWG DXF
High Wind-Resistant Construction D72: Wall to Pile/Girder
DWG DXF
High Wind-Resistant Construction D8: Girder/Truss to Wood Wall Framing
DWG DXF
High Wind-Resistant Construction D9: Girder/Truss to Wood Wall Framing
DWG DXF
HTT5
DWG DXF
HTT5-3/4None None
LTTNone None
LTT19
LTT19
DWGDXF
LTT19 front view
DWG DXF
LTT19 left view
DWG DXF
LTT19 right view
DWG DXF
LTT19 top view
DWG DXF
LTT19 & W
DWG DXF
LTT20B
LTT20B
DWGDXF
LTT20B front view
DWG DXF
LTT20B left view
DWG DXF
LTT20B right view
DWG DXF
LTT20B top view
DWG DXF
High Wind-Resistant Construction D6: Girder/Truss to Wood Wall Framing
DWG DXF
LTTI31
LTTI31
DWGDXF
LTTI31 front view
DWG DXF
LTTI31 left view
DWG DXF
LTTI31 right view
DWG DXF
LTTI31 top view
DWG DXF
LTTI31
DWG DXF