Sectional Tanks – Technical

All foundations for both ground and elevated tanks should be designed by a competent engineer to suit the site conditions.

The key to a lifelong trouble free tank service rests on foundations that provide a level solid platform for the tank, which will remain stable over time.

Plinths or dwarf wall is constructed of brick or concrete. These are the most economical supports and should be built in one direction only beneath each seam of the tank. They should exceed the length or with of the tank by 300mm overall (150mm each side). They should a minimum height of 450mm with a distance of 1220mm from centre to centre.

After constructing the plinths or dwarf walls, steel capping strips are placed on top of the wall. These must be levelled using solid packers and then grouted into position using a quality grout capable of withstanding the forces shown on foundation load table.

When using brick work one need to note that loads imposed by tanks exceeding 2440mm are considerable and the quality of bricks and workmanship must be sufficient to carry the loads. An alternative method of support is to use steel supports.

Plinths or dwarf wall is constructed of brick or concrete. These are the most economical supports and should be built in one direction only beneath each seam of the tank. They should exceed the length or with of the tank by 300mm overall (150mm each side). They should a minimum height of 450mm with a distance of 1220mm from centre to centre.

After constructing the plinths or dwarf walls, steel capping strips are placed on top of the wall. These must be levelled using solid packers and then grouted into position using a quality grout capable of withstanding the forces shown on foundation load table.

When using brick work one need to note that loads imposed by tanks exceeding 2440mm are considerable and the quality of bricks and workmanship must be sufficient to carry the loads. An alternative method of support is to use steel supports.

It is very important to take note of the type of soil one is constructing in. Different soils will need different types of foundations. For example: soils such as clay have a low load bearing capacity and may need a raft type foundation. That is why it is paramount to have professional soil analyses performed before construction commences.