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The Structural Engineer

Nearly 7 years have elapsed since the publication, in 1975, of the BRAC Sub-Committee P's report on high alumina cement concrete, and the Institution is concerned that many properties containing HACC that have been appraised by an engineer and found safe and adequate for purpose are still being valued lower than similar ones with OPCC. A working Party has considered the problem and has produced the assessment below.

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The Structural Engineer

This paper discusses the basic material properties that rnust be considered by the designer when producing glass structures. Various applications of these design considerations are described, together with the philosophy behind the development of particular structures. J.D. McCann

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The Structural Engineer

In connection with the drafting of the Code of Practice to succeed BS 449, two distinct problems were revealed relating to bolt strengths. The current values for 8.8 bolts in direct tension appeared disproportionately low having regard to ultimate tensile strength (UTS) values, compared to general grade high strength friction grip (HSFG) bolts. Also, no guidance is currently given on the ultimate shear values of general grade HSFG bolts,. although the use of a load factor of 1.4 against slip must imply that such bolts possess further capacity after slipping into bearing. M.H.R. Godley and F.H. Needham

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The Structural Engineer

A brief history is given of spectator facilities for the game of squash and related sports, culminating in the proposed ‘all glass’ demountable courts for use in suitable indoor spectator arenas. Design constraints and two alternative preferred structural forms for such courts are described, one utilising the glass walls as the only vertical loadbearing elements to support a court ceiling. The theoretical arrd load testing justification of these structures is considered, together with some proposed constructional details. Plastic is assessed as an alternative material to glass, Some other uses for related loadbearing glass structures are suggested. G.R. Hill

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The Structural Engineer

The eighth in the series of Surveys undertaken by the CEI was conducted in the summer of last year. The results, as applying to all chartered engineers, Graduates and Associate-Members of chartered engineering institutions, were published in December 1981. Copies of the full Survey can be obtained from the CEI, 2 Little Smith Street, London SWIP 3DL, price £lO.OO.

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The Structural Engineer

A nuclear structure facility is currently being developed by the Science and Engineering Research Council at their Daresbury Laboratory. This facility incorporates a 30 MV tandem Van de Graff electrostatic accelerator. The primary function of the accelerator is to accelerate both light and heavy ions. J. Cook, J.F. Dickie, M.C. Morris and Professor T.J. Poskitt

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