Preparing Ledger Board
Once the siding is cleared away and the sheathing exposed, you can measure and
cut the ledger board.
a good idea to test fit the board and make sure the length's right before marking
the joist layout and nailing on joist hangers.
TIP: If you're planning a skirtboard to cover the rim joists, cut your ledger board
a total of 1-1/2 inches shorter (3/4-inch on each end) so you can run the skirtboard
(usually 1x10 or 1x12) into the cut-out right up to the sheathing.
ledger board serves as a beam, supporting one end of the joists which are usually
laid out 16 inches on center.
most convenient to mark the joist locations on the ledger board and nail on joist
hangers before securing it to the wall.
the layout on one end by marking off a pair of joists to represent the rim
joists, which are often 2 joists side-by-side for strength on the edge of
a deck. Then hook a tape on the end of the board and measure out 16 inches.
represents the center of the first regular joist. To show where the edge
of the joist should hit, measure back 3/4ths of an inch (half the joist thickness)
to 15-1/4 inches.
TIP: Mark the other side of the first joist at 16-3/4 inches (1-1/2" total).
Otherwise, you might forget later on which side of the mark you're supposed to
put the joist on.
Continue laying out the joists for 16-inch centers by making marks
every 16 inches from the first marks all the way to the end: at 31-1/4" and 32-3/4" at 47-1/4" and 48-3/4" and so on.
at the end, mark off the rim joist positions to finish the layout. This often
results in less than a16-inch spacing on the end, but that's immaterial.
all the joist positions are marked, use a square to trace perpendicular lines
at each joist mark and highlight where the edges of the joists should hit.
After laying out joist positions on the ledger board, it's a good idea to transfer
the layout directly to the beam opposite the ledger board that'll support the
other ends of the joists.
a board to length for the beam.
up the edges of the beam and the ledger board with the help of a framing square
and then copy the marks from the ledger board right onto the beam.
Nail a joist hanger at each joist position. This is much more easily done before
the board's attached to the house.
a scrap of joist material to make sure you're not nailing the sides too close
or too far apart.
come in many sizes so make sure you get the ones designed for your joist size.
joist hanger nails to secure the hangers. They're short enough to drive into dimensional
lumber without going through the back. But they're thick enough to prevent shearing
off after installation.