The bolt and connector truss roof

For the bolt and connector truss roof a separate design should be prepared for the tank platforms with as much of the loads as practical being carried by the principal truss itself. The TRADA designs do not allow for tank loads and therefore any tanks carried in roofs constructed using the standard design sheets must be supported from walls below. One way of overcoming this problem is to close the centres of the principal trusses in the area of the tank thus effectively strengthening the roof in that area, enabling the structure to carry the tanks independently of walls below. Design advice must be obtained from TRADA. In such instances the design shown in Fig. 8.19 can again be used.

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