From: Roger Turk <73527.1356(--nospam--at)compuserve.com>
Date: Wed, 28 Apr 1999 16:52:08 -0400
I don't see why changing the nailing zones of diaphragms would be any
different than what is done in changing the spacing of stirrups in concrete,
or stiffeners in built-up girders, or discontinuing reinforcing steel, or
changing cover plate sizes. You take the closer spacing/greater capacity
requirements out **beyond** the point where larger spacing/less capacity
becomes adequate, and repeat as necessary.
At the point that the change is made, the closer spacing/greater capacity
elements are already much stronger than is necessary for the force at that
location (unless, for example, the change in shear is the result of a
concentrated load) and the closer spacing/greater capacity elements are
(should be) slightly stronger than is necessary for the force at that
location. To space nails differently on one side of a plywood joint than on
the other side is absurd.
Strive for accuracy, and don't worry about precision!
A. Roger Turk, P.E.(Structural)
Ben Yousefi wrote:
. > In many large diaphragms (i.e. tilt-ups) the nailing is divided into
. > several zones with the nailing requirements increasing as it gets closer
. > to the boundaries. My question is:
. > At the transition from one zone to another, what type of nailing is
. > required? Should the edge nailing of plywood pieces that cross over the
. > transition line be:
. > 1. The "boundary edge nailing" as required for the more restrictive
. > zone.
. > 2. The Nailing required for "other panel edges" for the more
. > restrictive zone
. > 3. Other
. > Please comment
. > Thanks
. > Ben Yousefi, S.E.