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[SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] Truss discussion.

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Regarding your response to Moore's question 1, the "state's statutes" may
not require a engineer or architect to be involved.  In this case, the
"Building Designer" can be anyone who orders trusses, or is building a
building.  For example, I am told that only 25% of Truss Design Drawings are
reviewed and sealed by a P. E.  Many buildings are built without an engineer
or architect involved.
Regarding your other comment about changes to the framing plan, WTCA 1-1995
requires that the Building Designer "Review and approve the Truss Placement
Plan and each Truss Design Drawing..." (See WTCA 1-1995, Paragraph 3.3).  
Hopefully, others will respond to your points. Frank Woeste, P. E.

At 09:17 PM 8/13/96 -0400, you wrote:
>Dr. Woeste,
>Regarding Neil Moore's question:
>> >1.      What if there isn't a building designer or engineer for a project;
>> i.e.
>> >only the contractor is involved, such as for conventional light-frame
>> >construction?  Who now is responsible for the web bracing?
>My interpretation of the WTCA-1 is at odds with your response that the
>Contractor is the Building Designer:
>Citing your quote of WTCA-1, para. 1.2.2: 
>>"Building Designer" is the individual or organization having >responsibity
for the overall building or structure design....."
>and continuing without interruption:
>"..... in accordance with the state's statutes and regulations governing
>the professional registration and certification of architects and
>engineers...... Also referred to as the registered architect or
>This stongly implies that the Building Designer is a licensed architect;
>or angineer; or archtictural or engineering firm - not a Contractor.
>I often have a very similar scenerio:  Although we try very hard to be
>retained to provide continuing engineering services during the
>construction of projects we design, there are instances (especially on
>governmental projects) where the owner retains an independant
>construction management firm.  In this case, the original design
>professional unually has no involvement during construction.  WTCA-1
>para 3.4 requires the Building Designer to "Specify permanent lateral
>bracing where indicated by the Truss Designer.", but the Truss Designer
>is nearly always a subconsultant to the Contractor, and doesn't even get
>involved in the project until after the bid is awarded - long past the
>time when the Building Designer is available.
>In a similar vein:  WTCA-1 requires the Building Designer to design all
>truss anchorage to resist gravity, lateral and uplift loads, but no
>matter how the Building Designer lays out a truss plan the Truss
>Designer invariably modifies the plan to be as economical as that
>particular plant can fabricate the trusses.  For example, one plant may
>have a stockpile of Select Structural 2x6's that they'd like to use,
>while another plant may have a stock of Grade 2's.  The Truss Placement
>Plan, and the load reactions, submitted for approval by the Truss
>Designer may be quite different from what the Building Designer had
>envisioned.  In such a scenerio, the Truss Placement Plan has to be
>summarily disapproved, or someone has to revise the truss anchorage
>design.  If the Building Designer isn't involved during construction, is
>it the WTCA-1's intent that the original Building Designer 'must' be
>retained to do these revisions to his design, or can another engineer be
>retained.  But if so, are there many licensed professionals that would
>be willing to 'come into the project' so late and become the Building
>Designer - and assume the liablility for the whole project.
>Thank you for making your WOOD DESIGN FOCUS article available to the sig
>members.  It seems to have generated some thoughtful discussion.
>Lew Midlam, P.E.
>Fort Myers, Florida