Loading

Attaching a Deck Ledger Board to Engineered Floor Joists

Floor truss systems are very different from conventional floor framing materials. Like a roof truss, floor trusses are created through joining standard lumber, typically 2x3 or 2x4, with metal connectors. The resulting, engineered product is a long-spanning floor joist - about a half to two times taller than a typical 2x10 - that is able to house HVAC ducts, plumbing and other service lines within the floor assembly. Floor trusses do not use a typical band (rim) joist around the edge of the floor, where ledgers are typically attached. They have to be handled differently. Technically, the straight and narrow answer is that an engineer must evaluate the floor truss system and design a connection method for a ledger. The other option is a freestanding deck or other method that avoids connection to the floor system altogether.

A slightly more relaxed approach would be to use the recommendations of the Structural Building Components Association (SBCA) in their document, appropriately titled, “Attachment of Residential Deck Ledger to Metal Plate Connected Wood Truss Floor System”. While a mouthful of a title, it provides detailed methods for doing exactly that, connecting a deck to a floor truss system. Five distinct connection details attempt to cover various configurations and methods for making the connection, including connections to wood and composite blocking, the ends of the trusses and the truss ribbon strip (a horizontal member similar to a band joist that connects the trusses together at the ends). Parallel and perpendicular orientations of the deck joists to the floor trusses are also provided. The general message is that it’s not a casual connection, and various considerations are necessary.


Popular Ledger Articles
Deck Ledger Board

Attaching the Ledger Board to the House Rim

Learn how to properly install a waterproof ledger board using flashing and fasteners. Check out our step-by-step video and detail drawings.

Deck Ledger Board

Installing A Ledger Board Around A Corner

Follow our tips to properly install a deck ledger board around the corner of a house to keep water out.

Deck Ledger Board

Ledger to engineered floor joists

Explore your options for building a deck onto a house with engineered floor joists.

Next Step: Care Articles
Deck Cleaning

Pressure Washer Buying Guide

When it comes to cleaning your deck, it's important to choose the right pressure washer. Use this pressure washer buying guide from Decks.com to help with your decision!

Deck Maintenance

How to Bug-Proof Your Deck & Floorboards

Prevent bug infestations below and above your deck using mesh, screens, and more. Learn how you can have a bug-free deck this summer with Decks.com.

Repairs

How to Remove Scuffs and Scratches from Composite Decking

Removing scuffs and scratches can help make your composite deck look like new. Learn how to fix and prevent your composite deck from future scratches.

Get more helpful resources delivered right to your inbox

Explore Articles by Topic

Popular Ledger Articles
Deck Ledger Board

Attaching the Ledger Board to the House Rim

Learn how to properly install a waterproof ledger board using flashing and fasteners. Check out our step-by-step video and detail drawings.

Deck Ledger Board

Lateral Load Device

Learn about your options for providing lateral load support for your deck. We explain recent code changes affecting deck building.

Deck Ledger Board

Attaching the Ledger Board to Brick Siding

Do you have brick siding? You should never attach to just the brick. This is very dangerous.

Next Step: Care Articles
Deck Cleaning

Pressure Washer Buying Guide

When it comes to cleaning your deck, it's important to choose the right pressure washer. Use this pressure washer buying guide from Decks.com to help with your decision!

Repairs

How to Remove Scuffs and Scratches from Composite Decking

Removing scuffs and scratches can help make your composite deck look like new. Learn how to fix and prevent your composite deck from future scratches.

Deck Finishing

Defy Deck Stain Reviews

Features: UV Protection, Water Repellant

Get more helpful resources delivered right to your inbox

Explore Articles by Topic