For the associated box gutter outlet.
Box gutter connection details.
A continuous lock strip is soldered to the apron at least 4 below its upper edge.
Sump with a side overflow device sumps do require an increase in the depth of flow in the box gutter and gutters are to be fitted with either.
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The gutter is supported by brackets spaced 30 o c.
The upper edge of the gutter apron extends at least 6 onto the roof and is folded over and held by cleats at 12 o c.
Box gutter connection details.
Straps are riveted or bolted to the outer edge at the gutter bead and attached to the roof with two brass screws.
Strap hung molded gutter.
Rainhead overflow or specific box gutter overflow must be at least 30mm below the height of the back of the box gutter.
This is a typical detail of a gutter hung by straps.
This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg.
In this detail a one piece copper gutter lining and apron is used in conjunction with a standing seam roof.
The straps should extend a minimum of 6 onto the roof.