Securing A Deck To A House With I Joist Flooring

A similar detail is available from wijma for when the i joists are oriented perpendicular to the rim joist.

Securing a deck to a house with i joist flooring.

There is no support below it. Like a roof truss floor trusses are created through joining standard lumber typically 2x3 or 2x4 with metal connectors. Predrill and sink 1 2 in. The easiest way to do this is to remove the existing house rim joist and soffit and any insulation inside the cavities.

Install the ledger between the rim joists and fasten it to the house with 3 inch decking screws. Anchor deck joists to the ledger with joist hangers filling each hole with galvanized joist hanger nails rated for pressure treated wood. Set the ends of the rim joists against the house and screw the l brackets into the sheathing. For wood decking using deck clips the first board is nailed or screwed to the joists as above.

The problem with attaching a deck to a cantilevered floor is that there is nothing below the cantilever overhang to keep the rim joist at the house from pulling loose. When i was framing floors with i josts in the late 80s engineered rim board was not available and we closed the rim with either an i joist or 3 4 inch plywood ripped to the i joist height. Another nail ties the clip directly to the joist. Dia galvanized or stainless steel lag screws in every other joist space alternating up and down positions to keep the ledger from splitting.

If you don t want posts and a beam at the house side of the deck then you ll need to run the deck joists into the house floor joist system so the ends rest on top of a bearing wall or mudsill inside. Attaching a deck ledger board to engineered floor joists floor truss systems are very different from conventional floor framing materials. Wood i joist manufacturers assoc when a deck is attached to a house with an i joist floor system where the joists are parallel to the rim joist blocking and fasteners must be added as shown before installing the lateral load anchors.