Where tanks are to be supported by trussed rafters, the size, type and position of the tanks should be clearly indicated.
The trusses must be specifically designed to carry the extra weight which should be distributed over three or more trusses by the use of spreader beams.



The loads should be applied as close as possible to the node points on the ceiling ties.
The maximum load imposed by the tank and it's contents must not exceed 450N at each adjacent ceiling tie node point.
In such cases, the support spreader beams should be designed to BS 5268: Part 2.

1. Offset bracing to clear tank bearers.
2. Tank placed centrally.
3. Node point.
4. Bay size.
5. Trussed rafter span.
6. Bearer placed as close to the node point as possible.

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