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This paper describes a computer aidedrafting system designed specifically to produce general arrangement plans and rein forcement details for floor slabs, together with bending and cutting schedules and quantities of the reinforcement. It is designed for use by draftsmen with little knowledge of computing procedures and has no restrictions on floor layouts or hole positions. It is a particular application of a general system that can be applied to the location and scheduling of any items that are
normally specified on building plans, and that has also been extended to items, such asprecast concrete units, that are best specified and located in terms of three dimensions rather than two. The instruction menus used in the system are described in detail.
G.M.J. Williams and T. J. Parsons
This paper outlines some of the ways in which the basic facilities provided by computer graphics have been used to enhance the output from design programs. It then goes on to discuss in general terms the problems of developing computer methods for the production of drawings per se. It illustrates the problem by reference to six currently available drafting systems examined by the author as part of a study contract from the Property Services Agency of the Department of Environment. The paper
gives conclusions on the systems studied and the current state of computer drafting systems generally.
The CADRAW computer drafting system was developed in the London office of Ove Arup & Partners. The objectives of the development, the various programs and their method of operation are described, and examples are given of the drawings produced.
R. Whittle and P. Morreau