I want to attach the ledger board directly into the hardiboard siding of the garage with lag screws using washers as spacers for drainage between the ledger and the siding.
Ledger bolts roof.
It only weighs 100 pounds it is a ledger board a front plate and eight 2x4 rafters sitting on two 4x4 posts.
You will usually need the length of the bolt to be at least 4 6 to penetrate through the 2x ledger board the house sheathing and into the solid house rim.
For this reason structural screw manufacturers that market fasteners specifically designed for ledger connections provide engineered fastener patterns and load tables and these are the ones you must use.
Flashing a patio roof ledger.
The bottom bolt must be a minimum distance from the top of the ledger.
That distance varies depending on the ledger size.
Spacing ledgers off the wall has been a code accepted practice since the 2009 when the international residential code irc included a prescriptive ledger fastening table for in.
If metal flashing is used holes must be drilled through the metal prior to drilling out the concrete.
Spacing for bolts and lags used to connect the deck ledger to the building are shown in the table at above right ledger bolted directly to the building and at in the figure at left for deck ledgers that are spaced away from the building.
For a really durable job consider applying 30 felt paper or metal flashing between the ledger and the concrete.
Plus you need to double fasteners at ledger butts and ends.
The bolt pattern must be clearly thought out 5 06 considering a 2x10 ledger and a 2x10 band joist as an example let s start at the beginning.
Either expansion bolts or epoxy can be used in this scenario.
Although more work it is absolutely a bullet proof solution.
Douglas fir lvl no attachment is allowed to strand lumber syp lvl the mudsill i joists floor trusses or other materials.
The table includes in.
Bolts and screws must be located 2 in.
The most common method is to install lag bolts with washers or carriage bolts with washers.
Standard galvanized lags and carriage bolts.
Lag screws and machine bolts.
Push or hammer the ledger back onto the bolts recheck for level making any needed adjustments add washers and nuts and then tighten the bolts.
House rim joist must be minimum of 2x sawn lumber or 1 in.
The ledger basically hangs on the top bolts but sits atop the bottom bolts so more space is allowwed.
Table of bolt spacing for deck ledger spaced away from the building.
The first bolt goes in from the end at least 2 inches and not more than five.
Down from top and up from bottom of ledger and staggered up down.
For a 2x8 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 2x8 band joist.
Even if the screw were magically invincible more structural screws would be required than lag screws to provide the same load bearing capacity.
Never counter sink bolts.
