A spider crane in action

A spider crane in action

Construction Process


Timbertanks are assembled on-site and can be built where access is difficult or site area restricted. Only a minimal standard of access way is required.

We have built reservoirs on environmentally-protected forest sites in New Zealand’s national parks to provide water supplies to both Franz Joseph and Whakapapa villages.


All Timbertanks require a level site for their foundations. Timbertanks over 100m3 require compacted hard fill and a concrete ring for the barrel to sit on.

A concrete slab or large concrete footing is not necessary or desirable. Pipe requirements do change so easy access to the inground pipes is a big advantage.

As all of our tank components are prefabricated, there is very little waste material generated on site. Sites are left in a neat and tidy condition upon completion.

Spider Lifting Tower

We developed this unique tower to assemble tanks and reservoirs in situations where an appropriately-sized mobile crane is not available or where there is either insufficient site area to locate a crane or there is no road access to the site.

The spider lifting tower is assembled at the centre of the site. The Timbertank roof is built around and between the tower’s legs, then lifted and held suspended while the barrel is built underneath it. The roof is then lowered onto the completed barrel and the tower is disassembled and returned to Timbertanks.

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Low Life Cycle Costs  


Storage tanks – moveable, expandable