AWWA D103-1997 (Bolted Steel Tanks for Water Storage)
Eurocode 3 (Design of Steel Structures Part 4-2: Tanks)

APT tanks also comply with the following Australian Building Code Standards.
AS4100 – SAA Steel Structures Code
AS1538 – Cold-formed Steel Structures Code
AS/NZS1170.1 – Loading Code – Dead and Live Loads
AS/NZS1170.2 – Loading Code – Wind Loads
NZS4219 – Seismic Resistance of Engineering Systems in Buildings

APT have tank located in Alpine areas of Australia & New Zealand, Seismic Zones of Saipan, Papua New Guinea, Indonesia, Vanuatu and New Zealand, Cyclonic areas from the Samoa to Port Headland WA, and to date have not experienced a tank failure due to external environmental forces.

Early in 2006 parts Australia experienced a Category 5 Cyclonic Event with wind gusts in excess of 300k/ph (180mph), APT has tanks located within 90km of the worst effected areas (Innisfail) at Cairns, Atherton and Cardwell with no damage or failure reported.

Roof Structure
Tanks can be constructed without a roof if required, as a standard APT provides a 5-degree pitch low profile roof. The roof is designed to be self-supporting during construction to ensure a safe work environment for construction crew and provide a sturdy durable structure that will last the life of the tank.

Constructed from galvanized C Purlins and brackets with zincalume, colorbond or aluminium profiled sheeting held together with high tensile HDG fasteners and cyclone rated roof screws provide a light, dust and vermin proof structure that is corrosion resistant and will give many years of service.

In severe corrosive environments such as demineralized water and effluent additional protection can be provided via flexible membrane liner that is suspended under the roof and sealed to the wall liner, providing an impervious barrier between the corrosive environment and the steel roof structure.

Foundations
The weight and bearing load of a tank structure is typically only a fraction of the forces imposed by the tank contents consequently water tanks need to be constructed on firm level foundations. In most cases APT’s standard range of foundation design will be adequate, however when poor soil conditions are present or the tank is very tall specific designs must be incorporated to ensure the structure will be able withstand the test of time.