Securing A Deck To A House With I Joist Flooring

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.

Securing a deck to a house with i joist flooring. Set the ends of the rim joists against the house and screw the l brackets into the sheathing. There is no support below it. Anchor deck joists to the ledger with joist hangers filling each hole with galvanized joist hanger nails rated for pressure treated wood. Another nail ties the clip directly to the joist.

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. 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. A similar detail is available from wijma for when the i joists are oriented perpendicular to the rim joist. Install the ledger between the rim joists and fasten it to the house with 3 inch decking screws.

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. Like a roof truss floor trusses are created through joining standard lumber typically 2x3 or 2x4 with metal connectors. Attaching a deck ledger board to engineered floor joists floor truss systems are very different from conventional floor framing materials.

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. Dia galvanized or stainless steel lag screws in every other joist space alternating up and down positions to keep the ledger from splitting. For wood decking using deck clips the first board is nailed or screwed to the joists as above.