ROHN
This Safety Cable System is used to Securely Tether Ballast dependent Roof Mount Appurtenances such as any FRM (Flat Roof Mount Series Antenna Mast, etc.) to stay in Position on the Roof in the Event of Movement due to Excessive Wind, Seismic Events, and other unforeseen anomalies. Though the components are akin to those used in “Guying” a similar structure in place, it is not being used as “Guy wire” or “Down-guy” in the traditional sense as it would necessitate the invasive installations of anchor points around the base and through the roof structure, entirely defeating the purpose of a non-penetrating mount. Rather, think of it as a “Leash” that keeps the dog on the roof where it belongs should the unforeseen occur.
One simply takes one end of the wire, wraps it a couple times around the Antenna Mast where it joins the bottom tray and close that cable end loop back upon itself with (3) of the (6) cable clamps provided, then run it through a hole in each of the concrete cinder blocks (ballast) if desired, and look to run the cable towards and attach the other end to; a single anchor point (in the opposite direction away from the roof edge or critical exposed structure); whether it be an existing one from original or prior construction, or your introduction of an anchor point to an existing rooftop structure above the roofline itself and weatherproofing material.
This cable does not need to be taut with any tension but slack, with excess cable cut away and then close the cable loop back upon itself with the remaining (3) cable clamps provided for this purpose. Obviously, both would require engagement with the owner or building maintenance staff there at the Commercial Property involved for approval.
Structural Anchor Point Hardware is Not included
Size & Grade Tensile Strength lbs
Initial Tension lbs
3/16" H.S. 2850 300
3/16" E.H.S 3990 400
1/4" H.S. 4750 500
1/4" E.H.S. 6650 700
5/16" H.S. 5350 550
5/16" E.H.S. 11200 700
3/8" H.S. 10800 1000
3/8" E.H.S. 15400 1500
PLP pioneered the helical formed wire design in the 1940s and shortly thereafter the GUY-GRIP Dead-End was born. Still an industry standard today, the GUY-GRIP anchors millions of utility poles all over the world. The GUY-GRIP is intended for use on single wood poles associated with distribution construction. They are made of the same material as the strand to which they are applied and are rated at 100% of the strand's published rated breaking strength
Description Big-Grip Dead-Ends are designed for use on Transmission, Antenna, Communications, and other types of guyed structures that require use of large guy strand. Big-Grip Dead-Ends should be used only on the size and strand for which they are designed. They must have the same lay as the strand to which they are applied. For use with Galvanized EHS Strand.
Big-Grip Dead-ends should not be used on hardware that allows the strand to rotate or spin about its axis uncontrolled. Adjustable hardware, such as a turnbuckle, may be used as long as rotational movement of the strand is restricted. Hardware used in conjunction with Big-Grip Dead-ends should have smooth contours, ample groove clearances, acceptable diameters and sufficient strength to minimize abrasion and fatigue of the loop area.