Military Handbook- Structural Engineering Steel Structures

Keywords military handbook steel structures structural engineering


Class A structures are those to which standard specifications for bridge type structures are applicable. Included are bridges, trestles, viaducts, and their components. The basis for classification as a Class A structure is the type of loading applied. This type of loading consists of groups or trains of wheels moving on the structure with impact effect. In addition the wheels and tires are presumed to be within a size range and range of inflation pressure (generally less than 100 psig) corresponding to those of wheels and tires for passenger car and truck usage. Class A includes structures carrying automobile and truck traffic, railroad traffic, certain typed or materials-handling equipment such as forklift truck (other than those having solid tires), and straddle carries. Class A does not include supports for overhead traveling cranes (Class B), mobile cranes or types of heavy lift cranes generally used for waterfront work (Class c), equipment Or . other equipment operating on tracks or oversize tires or forklift trucks having solid tire (Class C). In general, consider supports for machinery under Class B, with due consideration for impact and resonant response.

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Basic criteria for the design of structural elements and systems fabricated of structural steel or cold-formed light gage steel are presented for use by experienced engineers. Design standards are established for Class A (Bridge), Class B (Building), and Class C (Special) structures. Guidance for the design of special structures includes crane runways, towers, ‘stacks, storage tanks, and bins for storage of bulk solids. Problems of corrosion, abrasion, design of expansion joints, and exposure to extreme temperatures are discussed. Design cautions based on previous experience are presented in an appendix. A discussion of design practices that promote economy in the coat of materials, fabrication, and erection is also included in an appendix.

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