We do not view the truss designs that we review as inherently incomplete.
The designs we review generally conform to TPI standards and to our
drawings. As EOR we are responsible for the performance of the structure.
As EOR we could design the trusses ourselves and provide construction
documents showing how the trusses are to be built. However, industry
practice is to allow the trusses to be design-built with the design by a
Specialty Engineer. So then what defines exactly what the specialty
engineer will do and what will we do? First, there is a TPI document
defining our respective responsibilities. Second there are the project
specifications (on our drawings) which further define our responsibilities.
The Specialty engineers designs the trusses themselves and truss to truss
connections. We design the braces. The proprietary of the product is the
trusses themselves. They got stuck with the hangers because they are in the
best position to design the hangers. The rest is ours unless we
specifically define otherwise in the construction documents. I am not
saying this is the best way, right way, or moral way. This is in general
what the industry practice is and this is how we do our work. The client is
not paying extra. He is not paying us to design the trusses. He is paying
for a responsible person to assure that his structure is being built
correctly and to keep the design-build vender, who gets the job based on
lowest price, honest.
BTW our fee always includes as part of the base price one truss review. We
have assigned part of the design to the structure to another engineer. How
do we know that he likely followed our design intent unless we look at his
Respectfully, George Richards, P. E.
From: Roger Turk [mailto:73527.1356(--nospam--at)compuserve.com]
Sent: Saturday, January 13, 2001 9:39 AM
Subject: RE: Question on wood Roof Trusses
George Richards wrote:
>>I second Mr. Moore's opinion. Our plans (for houses, not even commercial)
require that we review the roof truss drawings for conformance with our
design intent. Over 90% of our builders do send us the drawings for review
prior to fabrication. The truss drawings are then forwarded to the Building
Official so that he can approve them. This is in accordance with the UBC
section on deferred submittals. The Clients know up front that this is the
process and they pay for the service. What the get is a safer home more
likely to be free of defects in design and construction.<<
Why should the client pay for an incomplete design of a proprietary product
and then pay the EOR extra to complete the design?
A. Roger Turk, P.E.(Structural)