Re: Birch is a birch is a. . .or not
Dave Mount
>Not to discourage you from using paper birch, but be aware that paper birch is significantly softer than yellow birch, the latter of which is mostly what's sold as "birch" when purchased generically. Paper birch, if sold commercially, is properly sold as "birch", but most "birch" is really yellow birch.
Paper birch is similar in hardness to cherry (which some people mistakenly think of as being hard, ref: some past discussions about molding plane bodies), whereas yellow birch is up there almost in red oak territory, both of which are about 15% softer than sugar maple. Paper birch is about 30% softer than hard maple.
That said, the issue is conformance to requirements, not whether it is as hard as sugar maple. Up here in northern Minnesota, the sugar maples grow so slowly and with so many problems (e.g., frost cracks) that I use a lot of paper birch in apps where others might use maple. It is a very pleasant wood to work. Virtually all drawers I make are paper birch and it dovetails beautifully. Your bench might dent a little easier than if it were sugar maple, but I wouldn't hesitate to use paper birch if there's an incentive to.
My $0.02,
Dave