Ibc Minimum Flat Roof Slope

This logic does not consider that lower sloped roofs will not drain water at the same rate as roofs with greater slopes.

Ibc minimum flat roof slope.

And 4 12 minimum roof slope for slate and wood shakes. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. When required testing is in accordance with astm e108 or ul 790. 2 1 2 12 minimum roof slope for clay and concrete tile.

I am looking at the ibc minimum roof slope requirement for standing seam metal roof. The minimum slope the code allows is in 12 in. 3 12 minimum roof slope for metal roof panels with nonsoldered seams without applied lap sealant metal shingles and wood shingles. 2 exactly does not translate to 1 4 per foot.

2 12 minimum roof slope for asphalt shingles photovoltaic pv shingles and building integrated pv. So typically we follow 2 slope is that meeting the code even if the slope is slight shy of 1 4 per foot. Ibc callouts for min 2 or 1 4 per foot. I understand this is more of rounding off to get to a nice number.

The ibc table 1505 1 lists the minimum requirements for roof covering fire resistance classifications a b or c for all types of. Minimum roof fire resistance ratings apply based on the type of construction and some building types do not require a fire rating. For steep slope roof systems ibc 2018 provides for a 1 12 minimum roof slope for mineral surfaced roof roll roofing. Per foot would be acceptable.