Lateral Tension System for Decks

The International Residential Code (IRC) requires that decks be designed to withstand both vertical and lateral loads. This 2015 code allows for tension ties to be attached to the deck joist then fastened directly to an interior sill plate, wall plate or stud – all from the outside.

These lateral connections must be designed to resist 750 pounds in tension and installed in four locations along the length of the ledger: one within 2' of each end of the ledger with two more evenly spaced between.

The FastenMaster Lateral Tension System (LTS) is a complete system designed to transfer the lateral forces on an exterior deck when attached to the wood frame of a structure.

The Lateral Tension System is approved for the five most common installation conditions:

  • Condition A: Sill Plate or Wall Plate Behind Ledger
  • Condition B: Sill Plate or Wall Plate Directly Below Ledger
  • Condition C: Sill Plate or Wall Plate 2” – 5” below Ledger
  • Condition D: Wall Stud in line with Deck Joist
  • Condition E: Wall Stud between Deck Joists

The FastenMaster LTS, is one complete kit to make all four of these code conforming connections. Each LTS bracket attaches an individual deck joist to a structural framing member of the house.

With the LTS, you can install the fastener first and then add the plate. The long fastener allows you to achieve the 3” of threading within the sill plate without having to access the interior of the house. You can achieve the code compliant connection in seconds.

For the Lateral Tension System technical bulletin, download it here.

For technical documentation of all our structural wood screws, see our Technical Resources page.


Lateral Tension System

Learn how the Lateral Tension System provides resistance to lateral loads on decks.

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Lateral Tension System
Lateral Tension System Kit FMLTS-4

Technical Bulletins

FastenMaster technical bulletins are abridged versions of our TERs that demonstrate general guidelines and fastening patterns.

Evaluation Reports (ERs)

These Evaluation Reports describe the results of research carried out by IAPMO Uniform Evaluation Service.

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