The better alternative is to cut the sister board to the same final length of the original joist. Match the ends to engage the ledger supports just like the original joist. Temporarily install the
Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - Sistering Deck Joists - Im building a deck thats 24x22 with two beams spaced 10 feet apart 2x10 construction, 12OC .
The term sistering joists is the practice of overlapping two joists by a certain distance across a beam to create an extended joist. This is unusual in new deck construction and would only be necessary for very long spans that exceed the length of your longest boards.
You can clamp the joist and sister together to hold them in place while you drill. You shouldn't need to support the cut joist while you repair it, unless there is extra weight atop the deck. The remaining boards of the deck should hold it in place.
One of my deck joists is cracked at the end of the board where it is attached to the ledger with a joist hangar. The crack is about 8 in long lengthwise. What would be the best method repair? Should I try sistering the joist or just adding a new joist directly next to the cracked one maybe a few
I raised the deck until the 2×10 rim joists were about 1/4 inch higher than the top of 6×6 deck post, then fastened the 2×6 sister block cleat to the 6×6 deck post with eight 8 of the 5 inch long FastenMaster LedgerLok structural wood screws which have Stronger design shear values than 1/2 inch lags. I drilled 1/8 inch pilot holes