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Subsection A, B, and C of Exception 2 are taken directly from the <br />statutes known as the Architects Law. (See PI page 2015 for more <br />detail.) <br /> <br />AS in "A# above, any building over 4,000 square feet in ground <br />area or more than 20 feet in height from the top surface of the <br />lowest flooring to the highest interior overhead finish, is <br />required to be designed by an engineer or architect. Trusses in <br />this area must also be designed by an architect or engineer. <br /> <br />In addition to the requirements in the Architects Law, the <br />building official is required to ask for architect- or engineer- <br />designed trusses in buildings smaller than 4,000 square feet or <br />20 feet in height unless the building official determines that <br />work is not of a highly technical nature or there is no unreaso- <br />nable potential risk to llfe and/or safety of the structure. <br /> <br />Most building officials find that truss design is of a highly <br />technical nature where there is a reasonable potential risk to <br />life and/or safety and so require trusses to be designed by an <br />architect or engineer~ <br /> <br />Answer to Question 5: If the builder can satisfy the building <br />official under Exception 2, the building official my authorize <br />use of such standard designs. <br /> <br />Answer to Question 6: UBC Standard Section 2~.1739 requires <br />periodic nonscheduled inspection. Each truss manufacturer shall <br />retain an approved agency having no financial interest in the <br />plant being inspected to make nonscheduled inspections of the <br />truss fabrication and delivery operations. The inspections shall <br />cover all phases of the truss operation, including lumber <br />storage, handling, cutting, fixtures, presses or rollers, fabri- <br />cation bundling and banding, handling and delivery. Section <br />25.1825 of the UBC Standard 2518 says each member shall be iden- <br />tified by the appropriate trademark of the approved independent <br />inspection and testing agency, legibly applied so as to be <br />clearly visible, if the strength of one surface of the beam of <br />the panel is different from the other, the top surface shall be <br />identified. For bolted trusses there are no quality control pro- <br />cedures in the UBC Standards. Bolted trusses are normally large <br />enough that they require job site fabrication and would be sub- <br />ject to the normal on-site inspection process. <br /> <br />The building official also has access to special inspection under <br />Section 306(a)12, Special Cases. Work which, in the opinion of <br />the building official, involves unusual hazards as part of the <br />special inspection process, may be accomplished under 306(f) <br />which provides for approved fabricators and an elaborate set of <br />controls which the building official may implement. <br /> <br /> <br />