Metal Roofing Framing Spacing

Purlin spacing is dependent on profile of the metal and gauge plus snow and wind load plus what the rafters are designed to carry.

Metal roofing framing spacing.

Roof pitch the metal roofing panels shown in this manual require a mini mum slope of 2 per foot to ensure proper drainage. When placing rafters for a tin roof also frequently referred to as corrugated metal or steel it is common to set the distance between rafters based on the size of the roofing panels. We re continually striving to manufacture metal roofing that s more durable efficient and sustainable. The trim and roofing sheet should be fastened every 12 to 24 inches along the gable edge.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Twenty four inches is a common spacing of furring strips for a metal roof.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. This allows the panels to be securely attached to the rafters for maximum stability. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. Correctly measure the spacing of furring strips for a metal roof to further decrease condensation.

Rafter spacing depends on the roofing panel size. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Union corrugating company is an industry leader serving the residential commercial and agricultural roofing and siding markets. Although the standard spacing of roof trusses may be the same as that of rafters with 24 inch spacing being a common option the design of a truss may allow for the use of a lower grade of lumber than would be required for rafters with comparable spacing and span.

Fyi we run purlins on 3 5 feet on center depending on size of purlin. Purlin spacing for metal roofing. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. Refer to the rain carrying table in this booklet for the maximum allowable panel length per.

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