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[SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] Truss discussion.[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)power.net
- Subject: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] Re: [SEAOC] Truss discussion.
- From: Frank Woeste <fwoeste(--nospam--at)vt.edu>
- Date: Wed, 14 Aug 1996 09:32:18 +0600
Lew: 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 >engineer..." > >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 > >... > > ...
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