How far apart should lag bolts be on a ledger board?

Typically, you will need to install your bolts alternating high and low 2″ from the top and bottom of the ledger board. As a rule of thumb, bolts can be spaced 16″ on center for supporting joist span up to 12′ in length. Longer joists will require tighter bolting patterns.Click to see full answer. Beside this, how many lag bolts do you put in a ledger board?Traditionally, lag screws have been the most common method of attaching decks to buildings. To properly attach a deck ledger using 1/2″ lag screws, 5/16″ holes need to be pre-drilled through the ledger and rim joist. After that, a 1/2″ hole should be drilled through the ledger only.Likewise, how big does a ledger board need to be? That distance varies depending on the ledger size. For a 2×8 ledger, the bolt must be at least 5 1/2 inches from the top of the ledger (4 1/2 inches is the minimum when the ledger attaches to a 2×8 band joist). For 2×10 ledgers, the minimum distance is 6 1/2 inches, and for 2×12 ledgers, it’s 7 1/2 inches. Consequently, can a deck ledger board be two pieces? The ledger board doesn’t have to be one continuous board. It can be a series of broken sections if it is solidly attached. This will require extra bolts and installing a 2x nailer across the top of the vent to secure the decking along the house wall.Should I pre drill for lag screws?Normal wood screws thread as they enter the wood, where lag screws require a hole to be drilled first. Lag screws also use a nut to add extra strength and security to help hold things together. Used for intense load applications, lag screws can support a much heavier load than the average sheet metal or wood screw.

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