TurboFast
Versatile tie for fixing timber or MDF to timber, bricks, blocks and concrete in numerous situations
MORE TURBOFAST APPLICATIONS
- High strength timber to timber connections.
- Pitched warm roof constructions. Pitched warm roof construction typically involves the direct connection of roof covering to supporting rafter, and the fitting of insulation either on to the lower side of the rafter or directly onto the floor of the roof cavity. By comparison, TurboFast allows for the cost effective construction of an alternative pitched roof structure where insulation is secured between the roof covering and rafter. This construction method is used commonly in Europe where it is known as warm roof construction.
Structural loads and pitched warm roof construction
Structural loads on a pitched warm roof must be considered differently from those on a traditional roof, where the weight of the roof covering is supported directly by the rafter. On an insulated warm roof the weight is taken up by the counterbattens, which are laid on top of the insulation, a non-structural element. The counterbatten effectively reproduces the rafter above the insulation and it is essential therefore that it becomes a structural member to which the tile batten can be fixed and, at the same time, hold down the insulation against wind suction. TurboFast fixings are able to achieve just this, resisting both the sliding and compressive loads of the roof covering while counteracting the tensile loads caused by wind uplift.
Sliding Load
As insulation thicknesses increase so do the sliding or bending loads that are imposed on the counterbatten. The laid weight of the roof covering and the roof pitch both affect the sliding load as the heavier the tile and the steeper the roof, the greater the load becomes. A consequence of the sliding load is that under the weight of the roof covering the insulation could compress, impairing its thermal performance. However, TurboFast, unlike traditional fixings, effectively withstands both sliding loads and compression loads.
Wind Suction
The counterbatten (usually 25mm-50mm thick and 38mm-50mm wide) must be thick enough to grip the TurboFast fixings and enable them to resist the wind uplift. It must not buckle under the sliding load between fixings and must be wide enough to meet the manufacturer s requirements for clamping the insulation. Wind suction will be affected by the anticipated wind speed, the height of the building, the site exposure and the local topography.
