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RE: Basement wall restrained by wood floor

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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)]
Sent: Thursday, August 26, 1999 10:59 AM
To: seaint(--nospam--at)
Subject: FW: Basement wall restrained by wood floor

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

Roger Davis
SDS Architects, Inc
205 N. Dewey Street
Eau Claire, WI 54703

-----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)
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
also the joists act to provide the restraint. Pretty stiff and pretty
in this direction. In the other direction, parallel to the joists, a
or bridging system has to be used to transfer the transverse shear at
bottom of the rim joists, that bears on the sill plate that's anchored
into the top of the wall, to the level of the floor deck.  In this case,
floor deck is indeed providing most of the strength and stiffness it
seem. But I don't see why it cannot be relied upon do its job. To design
wall as a cantilever against backfill loads has expensive implications
residential construction now that a structural footing is needed.