The EFASS range, like any other structure, must be securely anchored to the ground to withstand uplift, suction and shear from the wind loading and the spreading effect from snow and imposing roof loading.

> Fixing Arrangements

In theatre ground conditions vary from virgin ground to reinforced concrete slabs to cater for the building. The EFASS is supplied with its own integral foundation arrangement with various adaptations and accessories to securely anchor the structure to the ground.

> Foundation Forces

Environmental conditions vary worldwide and whilst this does not usually effect the resin bolt fixing, it does impact when ballast has to be procured. In order to reduce the ballast requirement to a minimum into concrete, foundation forces have been calculated on three different wind speeds as set out in Def-Stan 00-35 and then converted to ballast weight requirement for each scenario.

   Resin Studs               Spiral Anchors

Ballast Weights

> Water Seal

The steel foundation member mounted between footplates has its own rubber extrusion which is compressed when bolted down, providing a water seal along the sidewall of the hangar.

> Setting Out

The accurate setting out of a foundation layout for an aircraft hangar is usually complicated and time consuming and is normally done by a qualified surveyor. EFASS eliminates this requirement and de-skills this whole operation by providing a set of layout and drilling templates which ensure an accurate trouble free build plan.

> Ground Conditions

Ground conditions vary enormously in theatre in terms of ground make up and in order to provide a fixing solution we have identified them in three broad scenarios:

Virgin Ground

Fixing to virgin ground is a total nightmare to the engineering fraternity! Unless you have a detailed geotechnical survey you cannot quantify what is below ground and the engineer is unable to calculate pull out performance figures for any anchoring arrangement. In order to provide an acceptable solution we have selected proprietary spiral anchor which is easily installed with minimum equipment and has a proven track record with specified performance data in varying conditions.

Blacktop/Tarmac

This is very similar to virgin ground in terms of quantifying make up and performance under pull out and shear conditions. In these cases ballast weights or a combination of ballast and additional ground anchors can be used to achieve a complete anchoring system.

Reinforced concrete

Is usually the norm as most aircraft and vehicles require a solid base for operation and maintenance purposes which provides the perfect anchoring solution of studs fixed with resin.

Anchoring Options

Spiral ground anchors      11.1m span
Ballast                              11.1m span    20.4m span
Studs resin fixed              11.1m span    20.4m span    25m span