Author Question: When a ledger is installed to strengthen a stair assembly, treated lumber must be used if the ledger ... (Read 40 times)

itsmyluck · **on:** Jul 24, 2018

When a ledger is installed to strengthen a stair assembly, treated lumber must be used if the ledger is _____.

a. less than 2 in thickness
b. fastened with lag screws
c. in an area of high humidity
d. fastened to a concrete floor

Question 2

To add strength to the stair assembly, a pressure-treated 2 x 4 may be fastened to the floor to serve as a _____.

a. ledger
b. brace
c. strongback
d. purlin