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HOOK and LEVERAGE Strong - Easy - Fast VIBRATION RESISTANT SEISMIC APPLICATIONS The QuakeClamp provides an answer for Seismic applications. It remains secure during Extreme Shaking and Vibration. |
U-bolt and Window Clamps do not meet these requirements Unless the Strut channels are placed on the inside of and between the Beams. This means the strut channel has to be cut to fit between beams. Waisted strut channel drops are likely. |
The QuakeClamp grabs the strut and beam in one leveraged total entrapment. The strut and beam is held together with the spring action of the clamp. This insures constant clamping where the force that causes sliding remains high even after slipping begins |
An early version of the QuakeClamp has been in use for over 8 years. The clamp is holding thousands of accessories to boat trailers. The bouncing, shaking, and extreme vibration on the road far exceeds the dynamics of an earthquake. |
Choices for beam clamps that meet various seismic code requirements are quite limited. Common U-bolt clamps do not meet anchorage requirements since they rely on friction to hold in place and are susceptible to walking off the beam. Clamps that use restraining straps are limited in how they can be used. The way retainers and straps are used has to be evaluated for each situation as they are applied during installation. Unfortunately, because there have not been good choices, common clamps are often used even though they fail to meet basic requirements. Engineers need components that are acceptable in all situations. The QuakeClamp can solve these problems. The QuakeClamp grips as one unit around the strut channel and both flanges of the beam eliminating any need for additional retainer/safety straps or other anchorage devices. It hooks and leverages to efficiently hold the strut channels using only one bolt and nut. Not only does it meet basic requirements for seismic codes, the QuakeClamp is the economic choice in non-seismic applications. It is competitively priced and saves 4+ minutes installation time for each connection. It also works as the basis for single point and trapeze hanger assemblies when used with standard strut channels or stronger hanger bars. The QuakeClamps for holding pipes and conduits will be available in the future. QuakeClamps are easily scalable to needed sizes and capacities. Our Hanger Clips provide many ways to hang and brace loads. • Spring Action – Clamp flexes as bolt is tightened. • Total Entrapment griping both sides of I-beam and strut channel. Built in across beam restraining. (No safety strap required) • QuakeClamps can hang loose and still not fail. • Priced for everyday non seismic use. • Use for direct attachment or with a hanger assembly. QuakeClamps have a straight load path and do not apply unwanted forces to strut channels. When the U-bolt clamp is tightened, loads are applied through both ends of the bent plate. One end creates clamping forces pulling the beams flange and strut channel together. The other end pushes against strut channel in the same direction as the load adding to forces on the strut channel. This force decreases the actual load that the strut channel will be able to support. As tightening occurs the combined forces on each end of the bent plate in opposition to the U-bolt can cause the strut channel to begin to crush further weakening the strut. The load path is offset and not straight through the beam flange. The QuakeClamp was tested and evaluated to the MSS SP-58-2009 standards by NC State University. |
QuakeClamps meet these requirements. |
Seismic Standards |
www.nuclamp.com Info@nuclamp.com 336-643-1766 |
Seismic Advantages |
US Patent Numbers 8480041 8714495 8770885 |