Securing A Deck To A House With I Joist Flooring

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.

Securing a deck to a house with i joist flooring.

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. To install the clip you drive a nail at an angle through the hole in the vertical neck of the clip and on through the decking and into the joist. If necessary create spacers by attaching pieces of decking to the top side of the frame that goes against the house. Attaching a deck ledger board to engineered floor joists floor truss systems are very different from conventional floor framing materials.

Deck ledgers cannot be attached to these i joists or nonstructural plywood rims. For wood decking using deck clips the first board is nailed or screwed to the joists as above. A similar detail is available from wijma for when the i joists are oriented perpendicular to the rim joist. Set the ends of the rim joists against the house and screw the l brackets into the sheathing.

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. Anchor deck joists to the ledger with joist hangers filling each hole with galvanized joist hanger nails rated for pressure treated wood. Like a roof truss floor trusses are created through joining standard lumber typically 2x3 or 2x4 with metal connectors. Another nail ties the clip directly to the joist.

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. The easiest way to do this is to remove the existing house rim joist and soffit and any insulation inside the cavities. Predrill and sink 1 2 in.