Laying Out Footings
Use string and stakes or batterboards to lay out lines representing the deck and
measure off those to locate the footing positions.
get started, use a plumb bob to transfer the outside edges of the deck from the
ledger board down to ground level.
string to the siding and tie the other ends to wood batterboards or stakes set
out beyond the length of the deck.
the 3-4-5 Method
the 3-4-5 method to set the strings square (at a 90 degree angle) to the
Mark a point on the string 3 feet (36") from where the string hits the wall.
a 2nd point on the house wall 4 feet (48") from where the string hits the wall.
out from the 1st point on the wall to the 2nd point on the string and move the
string till the 2nd point is exactly 5 feet (60") from the 1st point on the house
wall. Then the string is square to the house.
Footing Positions on Strings and on Ground
Measure and mark the length of the deck on each string.
a third string between those marks to represent the outside edge of the deck. Using the plan
as a reference, measure and mark the center of each footing position on the strings.
up a plumb bob with each mark on the string. Drop
the plumb bob to transfer those marks to ground level. Mark
each spot with a nail and a bright strip of tape or cloth.