Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: Basement wall restrained by wood floor

[Subject Prev][Subject Next][Thread Prev][Thread Next]
I would think you would want to specify the structural requirements (not
necessarily the same as code minimum).

-----Original Message-----
From: Roger Davis [mailto:rdavis(--nospam--at)sdsarch.com]
Sent: Thursday, August 26, 1999 10:59 AM
To: seaint(--nospam--at)seaint.org
Subject: FW: Basement wall restrained by wood floor




The thing that bothers me the most about the wood floor system bracing
the
basement wall is the standard 1/2" bolts at 6'-0" to 8'-0" on center.
They
never work when I calculate them.

Roger Davis
SDS Architects, Inc
205 N. Dewey Street
Eau Claire, WI 54703
715-832-1605
rdavis(--nospam--at)sdsarch.com


-----Original Message-----
From:	James F Fulton [mailto:James_F_Fulton(--nospam--at)RohmHaas.Com]
Sent:	Thursday, August 26, 1999 7:15 AM
To:	seaint(--nospam--at)seaint.org
Subject:	Basement wall restrained by wood floor

In 99.9% of the residential construction I've seen, the basement wall is
supported by a strip footing, usually 20" wide or so. This type of wall
relies on the support at the top provided by the first floor. In one
direction, the direction of the floor joists, not only the floor deck
but
also the joists act to provide the restraint. Pretty stiff and pretty
strong
in this direction. In the other direction, parallel to the joists, a
blocking
or bridging system has to be used to transfer the transverse shear at
the
bottom of the rim joists, that bears on the sill plate that's anchored
bolted
into the top of the wall, to the level of the floor deck.  In this case,
the
floor deck is indeed providing most of the strength and stiffness it
would
seem. But I don't see why it cannot be relied upon do its job. To design
the
wall as a cantilever against backfill loads has expensive implications
for
residential construction now that a structural footing is needed.