Fabric-Covered Steel Out Buildings
Rigid steel is a time-tested framing method popular in all types of building construction. Legacy’s fabric and metal outbuildings rely on solid steel beams for strength and resistance to corrosion.
Our steel-framed buildings are installed with cross-bracing reinforcements, cable bracing and purlins, similar to non-fabric buildings. Our purlin sections are closed sections, which mean that they can withstand torsion and bending stresses better. We locate our purlins below the rafter beam to address axial loading and minimize bending forces coming from the flange braces. This allows us to use secondary supports in smaller sizes because any wind or snow loads do not hit the purlins directly.
Our goal is to maintain material quality up to the smallest members of the structure. We offer zinc-coated, galvanized or stainless steel bolts. Our cables are available with galvanized coating or stainless steel. We use hollow structural sections, also known as HSS, as framing for the end wall of our fabric buildings. HSS members are known for their good strength-to-weight ratio.
Strong side walls are an essential component in making our structures strong and stable at a reasonable cost. The top flanges are supported by solid steel flange braces, which eliminate the need to install any additional cable bracings. If cross-bracings are used, they are made of galvanized cables with turnbuckles for easy adjustment. We make sure that all of our installations are load tested for maximum safety.
Another advantage of using steel I-beams for your fabric building is their lower depth compared to open web trusses. The frames do not occupy as much ceiling or overhead space. We combine shallow frames with straight side walls to maximize the interior space within the available building footprint.
Hot Dipped Galvanization (HDG) for Corrosion Resistant Steel Frames
The solid I-beams on our fabric buildings are more rust-resistant than the open web truss supports that others use. Web trusses have hollow tube sections. Should corrosion begin inside the tube, it will not be noticed until the corrosion has spread to the outside of the tube and becomes visible. By the time this has occurred, little can be done to restore the steel member.
In contrast, our fabric buildings rely on steel beams that are formed from 55 ksi steel plates. They are formed by qualified and certified welders. They are available with grey or red paint, any powder coated colour or hot dip galvanized finish. Hot dip galvanizing (HDG) is a chemical process that coats steel with a layer of zinc to prevent steel corrosion under many conditions. Our HDG process follows the ASTM A123 galvanizing standards. You might encounter companies that offer in-line or pre-galvanized steel frames. HDG offers a much higher level of corrosion resistance, especially at welded joints.