The ledger provides much of a deck’s strength; it supports the joists at one end, and it provides stiffness to the framing. (A free-standing deck, of course, does not have a ledger.) The ledger is made of the same material as the rest of the framing—usually pressure-treated lumber...
Indoor stairs and Danban fixing bracket PROBLEM TO BE SOLVED: To provide an indoor staircase capable of ensuring an attractive appearance and sufficient tread fitting strength.SOLUTION: The present invention relates to an indoor staircase in which a tread 3 is supported by a b... 林 淳一,荒川...