ABSTRACT
The chapter examines various types and characteristics of wide-span buildings: one-way-spanning buildings; combination portal or cable-stayed spine frame with lateral lattice girders; two-way-spanning trusses, vierendeel girders or space deck systems; domes springing from circular or polygonal bases; one-way-spanning cable girder and two-way-spanning cable net roofs; and air-supported roofs. Make a preliminary design for a wide span roof with a tie-stayed spine support structure. The roof construction is to consist of steel decking supported on purlins carried on lattice girders. The covering is several layers of felt on insulation board. Preliminary designs are to be made for: roof lattice girders; spine girder; front and back stays and column tie; and spine frame column. The chapter discusses the design for stability and wind load. The three components of wind load must be calculated for wind blowing in the transverse and parallel directions: wind on the building face; wind on the suspension frame and column; and frictional drag on the roof and walls.
