Rooftop duct supports

    HVAC rooftop duct supports for any situation. Adjustable height and two base options allow for maximum flexibility. The counterweighted concrete base is made with extremely durable high-strength concrete and will last for years. The polycarbonate base is a 16" round UV-stabilized base ideal for non-penetrating HVAC support applications. Need a fully engineered solution for wind & seismic applications? We can do that too, contact our distribution partner to get started.

    Available from our partner Unistrut Service Company

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    Why do I need quality rooftop duct supports?

    The ductwork on a building's rooftop is a big investment, and therefore is something that needs to be protected. This can be done by using a quality duct support solution, like those provided by On Deck. These duct supports will hold the duct off of the roof as well as help hold the duct in place.

    Can I make my own rooftop duct supports?

    Yes, you can, although most DIY duct supports are not designed properly and often are made out of inferior materials, such as wood or steel or aluminum angle. This can lead to a support that is more likely to fail over time, causing damage to the duct work and potentially the roof membrane.

    On Deck offers free system design with any duct support project, whether it's a few small supports or a large multi-building unit with complex ductwork. Entrusting it to experts guarantees that the duct will be protected for years to come, saving money, as there will be no need for expensive repairs or constant upkeep.

    For those determined to build their own supports, if the right materials are used, such as Unistrut Channel, a key consideration is what type of base to use. The key is to choose a base that will not break down over time. Constant exposure to weather, UV, bugs, birds, dirt, and more can take a toll on improper base materials, such as wood, compressed rubber, or foam.

    On Deck's concrete and polycarbonate bases are available for standalone purchase for those wishing to design and build their own system. Both base styles have ample surface area on the bottom of the base, ensuring that the load from the equipment to the roof membrane is evenly distributed. Keeping PSI from the base to the roof surface is key to protecting the membrane and underlying insulation.

    What are the best rooftop supports?

    The ideal duct support for any situation will be easy to order, easy to assemble, and easy to adjust. Often times there are fluctuations in the height of duct above the roof surface, so an adjustable support allows for easy on-the-fly modifications to keep the duct properly supported. On Deck's adjustable duct supports also allow for easy accommodation of roof slope, via our patented base bracket. This ensures proper contact between the support and the roof, eliminating hot spots or undue stresses.

    Do I need engineering for my duct supports?

    Generally speaking, buying an engineered solution will protect the building and equipment better in the long run. Engineering is absolutely a requirement in any areas subject to high wind or seismic activity, as the rooftop supports will need to provide sufficient attachment to withstand potentially damaging events.

    On Deck has in-house engineering for such scenarios and can provide fully engineered solutions. Contact an On Deck supplier with any questions about engineered rooftop supports.

    How far should duct supports be spaced?

    When it comes to roof duct support spacing, a general rule of thumb is to not exceed 5' on center for straight lines of duct, as well as ensuring that elbows, offsets, and duct start and endpoints are all supported. On Deck will calculate exactly how many duct supports you need as well as the spacing and location absolutely free with any duct support system.