Selection of a roof frame for a gymnasium

Abstract

This thesis is concerned with the choice of an appropriate roof frame for the gymnasium element of a high school designed by Joseph P. Staniunas as a thesis for the degree of Master of Science in Architecture. The writer is not attempting to consider every possible condition of framing which might be used in this structure. The frame spacing indicated in the original design is accepted without question, because the fifteen foot spacing given is very nearly the condition for maximum economy for conventionally loaded roof slabs of minimum depth. The framing types are limited to the two-hinged and the three-hinged forms as indicated in the original design. Only two materials, structural steel and reinforced concrete, are considered, although it is recognized that laminated wood might also be suitable.

In his thesis, Mr. Staniunas expresses a preference for laminated wood arches to span the gymnasium. He feels that "laminated wood arches give a cleaner appearance to the interior." This writer believes his objective may be equally well obtained in steel or concrete. Therefore, the frames will be designed on this basis, selecting from the four, the best from the standpoints of structure, aesthetics, and economy.

The computations occupy approximately 200 pages. It is not felt that this material could be successfully compressed for inclusion in this presentation. Instead, the entire body of computations is reproduced on microfilm and the film is on file at the main college library.

The writer feels that the three-hinged steel frame is the most desirable of the four for the following reasons, in order of importance: (a) In appearance it is the lightest and airiest of the four frames examined and accords well with the general character of Mr. Staniunas' design. (b) It is one of the least costly of the four frames. (c) It is readily erected with light equipment Which would be an advantage in Blacksburg, where heavy equipment is not easily available.