Heavy Pipe Knuckleheads are engineered to support large pipes up to 3” in diameter for such applications as natural gas and water pipelines.
KnuckleHead Heavy Pipe Supports are designed for a wide variety of roof support applications including natural gas and water pipelines, and other types of pipes up to 2.5” nominal pipe size. Each KnuckleHead can support up to 600 lbs. Units can be spaced to evenly distribute the load of the heaviest equipment. Heavy Pipe supports are lightweight, so they add little to total roof load, preventing low points and depressions that invite ponding water and ice build-up.
- Supports up to 3” outside diameter pipes
- 2.5” to 3.5” adjustable height from base to support point
- Each KnuckleHead is able to support up to 600 lbs.
- Molded from GREEN LINK Type 1 glass-reinforced nylon resin. Strong, tough, weatherproof, impervious to freeze-thaw cycles
- Matte-finish nylon allows bonding with adhesive
- Base designed for adhesive attachment or mechanical fastening for seismic/wind uplift specification
- Height extensions up to 18” are available.
KnuckleHeads prevent damage to the membrane caused by ponding water, wind, ice, flying debris, or seismic events and protect the integrity of roof-mounted structures and equipment. GREEN LINK can custom-cut metal struts, or design and manufacture special support elements such as a custom-molded base pad for a corrugated metal roof.
They are engineered with a Universal Base that can accommodate a range of head designs depending on the particular support application needed.
KnuckleHeads can be loose-laid or attached directly to the roof either mechanically and/or with GREEN LINK Adhesive/Sealant.
The Universal Base is designed with four holes at its center for accepting mechanical fasteners. Before penetrating the roof membrane, the contractor should consult with the manufacturer to ensure that the warranty is not voided.
Securing the Installation: The KnuckleHead Lite Pipe Support comes with a custom-engineered KnuckleCap. Molded from tough, weatherproof polymer and tinted safety yellow, the cap is screwed onto the head to ensure the pipe is secure even in harsh conditions. An optional slip-resistant KnucklePad can be added to the base to reduce movement and protect the roof membrane.
GREEN LINK Adhesive/Sealant can be used by itself to form a bond of up to 275 psi shear strength. This prevents movement of the supports caused by equipment vibration, high winds, or seismic events.
When mechanical fasteners are used, GREEN LINK Adhesive/Sealant should be applied across the bottom of the base on each screw head to prevent roof leaks caused by penetrations.
The base features 16 holes, allowing adhesive to squeeze out as the base is pressed onto the roof surface. This creates “adhesive rivets” which strengthen the bond.
KnuckleHead installations have been performing in the field for more than 20 years with continual exposure to high temperatures, freeze-thaw cycles, UV exposure, and stress, and they have shown no signs of deterioration.
GREEN LINK Adhesive/Sealant is environmentally safe and presents no toxic risk to contractors or building occupants. It is solvent-free, isocyanate-free, non-flammable, and odorless.
Drawing | Tech-Data | Installation