American Steel Buildings, LLC 1-800-511-3670 Copyright 2010Home I About Us I Contact Us I Buying Process I F.A.Q.The Roof Slope is explained as the tangent of an angle that a roof surface makeswith the horizontal, usually expressed in units of vertical rise to 12 units of horizontal runThe roof pitch or roof slope is usually shown as a ratio to 12 (i.e., 1:12, ½:12, 4:12, etc.). When inches are used as a basic unit, a 4:12 roof pitch means that the roof rises 4 inches in every 12 inches measured horizontally across the width of the building from the side to the peak of the building.So as an example, if you have a 60’ wide building and the eave height is 10’ tall,from the sidewall to the center of the width of the building it would be 30’ wideWith a 2:12 slope, for every foot in width you gain, you will be adding 2 inches in height.With 30’ to the center of the building you will have gained 60” inches to the center of the peakWhen you divide that by 1 foot (12 inches) we see that we will have increased by a height of 5’ feet.So a 60’ wide building with a 10’ eave and a 2:12 roof slope will have a peak of 15’where-as a 1:12 slope will have only added 2’6”, 12’6” peakWe offer roof slopes from .25:12 up to 6:12 (and greater upon special request)Please view the pictures below to see several examples of buildings with different Roof SlopesAmerican Steel Buildings