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(The Engineering Review Committee \(ERC\) monitors, provides advice and o\
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(procedures, etc., affecting the metal plate connected wood truss industr\
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(and use of trusses. The ERC closely cooperates with and participates in \
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(Institute and its Technical Advisory Committee, as well as any other cod\
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(setting organizations. In addition, the committee serves as the Engineer\
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(WTCA. )Tj
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(INTERNATIONAL BUILDING CODE)Tj
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(In addition to the code change work concerning truss design requirements\
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(\), the ERC is challenging an IBC code change proposal by the Gypsum )Tj
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(Association that would require the ceiling membranes in one-hour fire en\
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(assemblies with \223pitched engineered roof trusses\224 to be one-hour r\
ated. Current practice allows )Tj
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(for the substitution of pitched roof trusses into any of the fire endura\
nce assemblies that have )Tj
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(been tested using trusses. These include L528, L529, L534 and L542 from \
Underwriter\222s )Tj
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(Laboratory, Inc., and FC5512, FC5515, FC5516 and FC5517 from the Gypsum \
Association. The )Tj
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(majority of these assemblies have been tested using parallel chord truss\
es of a minimum depth )Tj
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(and with the lumber in the trusses oriented flatwise \(i.e. wide face or\
iented horizontally\). These )Tj
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(tested assemblies represent the \223worst case\224 conditions with respe\
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(connector plate orientation and assembly thickness. Pitched roof trusses\
are generally much )Tj
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(deeper and use larger members than the trusses used in the tested assemb\
lies. Since the larger )Tj
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(member sizes will provide a fire endurance rating that is at least equal\
to if not greater than the )Tj
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(smaller members, direct substitution of roof trusses for the parallel ch\
ord trusses is generally )Tj
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(acceptable. The Gypsum Association\222s proposal seems to ignore this pr\
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(one-hour rated ceiling membrane with all roof/ceiling assemblies using \223\
pitched engineered roof )Tj
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(trusses\224 when a one-hour fire endurance rated roof/ceiling assembly i\
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(to use a ceiling consisting of two layers of 5/8" type X gypsum wallboar\
d. However, this will )Tj
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(change the economics of roof/ceiling assemblies significantly. WTCA and \
AF&PA have submitted )Tj
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de hearings in St. Louis this )Tj
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IBC. \(More information )Tj
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(about how these new codes could impact the industry will be presented at\
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(more about this seminar check out the BCMC web site.\) )Tj
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(The ERC has also submitted a proposed code change to both the Internatio\
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(\(IPC\) and the International Mechanical Code \(IMC\) concerning the fie\
ld alteration of trusses. The )Tj
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(proposed code change is identical to the one used in both the IBC and th\
e IRC and reads as )Tj
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(follows: Alterations to trusses. Truss members shall not be cut, drilled\
, notched, spliced or )Tj
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(Alterations resulting in the addition of load \(e.g., HVAC equipment, wa\
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(exceeds the design load for the truss, shall not be permitted without ve\
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(FLORIDA BUILDING CODE)Tj
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( )Tj
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(The State of Florida is in the process of developing a single, statewide\
code to replace the many )Tj
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(local and state building codes in existence today. The intention is to r\
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(complexity of the existing system. Adoption of the new code has been tar\
geted for 2001. The )Tj
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(ERC is working in tandem with the five Florida Chapters of WTCA to monit\
or the development of )Tj
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(the Florida Code. A critical portion of this involvement will be to thor\
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(The mission of Structural Building Components Magazine \(SBC\) is to inc\
rease the knowledge of and to promote the )Tj
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(common interests of those engaged in manufacturing and distributing of s\
tructural building components to ensure growth )Tj
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(and continuity, and to be the information conduit by staying abreast of \
leading-edge issues. SBC will take a leadership )Tj
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(role on behalf of the component industry in disseminating technical and \
marketplace information, and will maintain )Tj
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(advisory committees consisting of the most knowledgeable professionals i\
n the industry. The opinions expressed in SBC )Tj
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(are those of the authors and those quoted solely, and are not necessaril\
y the opinions of any of the affiliated associations )Tj
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