Brayton Standards - A Pocket Companion For The Uniform Design Of Reinforced Concrete (Paperback)

Preface Reinforced concrete has ceased to be an experiment in the hands of the specialist. The strength of the various members required in the composition of a structure, can be as safely calculated in reinforced concrete as they can be in wood or steel. The principal difficulty at the present time lies in the fact that the specialists doing this class of work are largely in the employ of companies who are exploiting some particular feature in the line of reinforcement. Architects and engineers have grown into the habit of specifying that the contractor shall furnish the designs for the reinforced portions of the work under consideration. General contractors in turn have been obliged to go to subcontractors who make a specialty of this line of work to get the de- signs. The result has been that no two competitors base their bids upon the same design. The one accepted may be unnecessarily expensive be- cause of the patented features in the reinforcement used, or it may be unsafe because of the insuffici- ency in the materials, or an inefficiency in the design. Brayton Standards is a compilation of informa- tion acquired from actual experience, coupled with the necessary theory. The methods of construc- tion shown are not merely theoretical, but have been put into practice and found highly efficient and economical. No patented bars areused, although there could be no objection to them if placed in equivalent quantities, and in the forms shown. Plain, round rods are the cheapest form of rein- forcement, as they may be bought in any market and are not subject to the prices quoted upon bars of special design. They will accomplish every duty required of them if they are placed in the properform, as indicated in the accompanying details. Where some form of distorted bar is consider- ed necessary to aid the adhesion of the concrete, plain twisted square bars will serve every purpose. These may be obtained from many sources with- out extra cost, except that added for the labor of twisting. The primary object in placing these tables and details in such form as to be available for the use of all, is to enable arthitects and engineers who have not made a specialty of this class of work, to show the complete drawings required to properly illustrate a structure in reinforced concrete, so that all contractors bidding upon the work will bid on a uniform basis, and upon a design which is entirely satisfactory to all those concerned. Brayton Standards are conservative, and as accurate as is consistent with this class of work. It is hoped that the use of them will render the design of reinforced concrete as easy for architects, engineers and builders as is the design of a steel structure at the present time. Principles of Design The Theory TABLE OF CONTENTS 3- 5 6- 9 The Location of the Steel 10-11 Distribution of Load in a Rectangular Panel 12-14 Slab Reinforcement 15-18 Bending Moment in Slabs for various Types of Reinforcement - 19-21 Bending Moment in Slabs for Various Loads and Spans 22-25 Properties of Slabs 26-28 Moment of Resistance of Slabs 29-42 Capacities of Slabs 43-45 Properties, Area and Tension of Wire 46-51 Properties, Area, Tension and Weight of Rods 52-61 Beam Reinforcement - 62-66 Bending Moment in Beams 67-70 Moment of Resistance in Beams 71-74 Shear Loops for Beams 75 Columns 76-85 Column Binders - - - - 86-87 Footings TABLE OF CONTENTS - - - 88-90 Stairs 91-92Adhesion of Concrete to Rods - 93-94 Lumber for Forms 95-98 Proportions of Material in Concrete 99-103 Shop Details ------ 102-110 Dedication to the Public...