Box Gutter Framing Detail

They should not be confused with so called valley gutters or valley flashings which occur at the non parallel intersection of roof surfaces typically at right angled internal corners of pitched roofs. Most box gutters consist of wood framing covered by a thin sheet metal lining made out of galvanized steel stainless steel copper or another metal that will not easily corrode. A box gutter is defined as a graded channel generally of a rectangular shape for the conveyance of rainwater within the building footprint including adjacent to a wall or parapet.

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When lining a masonry cornice the edge strip can be secured to the masonry cornice with brass screws and lead shields 12 apart.

Box gutter framing detail.

The foundation of most box gutters is wood that is then covered with thin sheet metal such as tin copper lead stainless steel or some other metal that will not readily corrode. Clearance for downspouts through the wood framing is a minimum 1 2 all around. 44 0 1327 701 900 e. The shape of the box gutter is created by a skilled carpenter as the shape and.

Box gutters are deemed to satisfy the performance requirements of the national construction code if they are certified to meet. The details shown are for the lining of a wood box gutter frame. The box is built by an experienced carpenter into the roof overhang or into the bottom of the roof then lined with the sheet metal. A box gutter is actually built into the bottom of the roof or into the roof overhang.

Box gutters are essentially placed between parallel surfaces as in a valley between parallel roofs or at the junction of a roof and a parapet wall. On this page you can find the pdf instructions for installation of a typical box gutter detail with the dryseal flat roofing system.