which is defined as the distance from outside of eave purlin of one side wall to outside of eave purlin of the opposite side wall.

Flush endwalls, is the distance between the outside flanges of endwall columns in opposite endwalls is considered as the building length.
By-pass endwalls, is the distance between the outside of wall girts in opposite endwalls is considered the building length.

Is the angle of the roof with respect to the horizontal. the most common roof sloped in the area is 0.5/10 and 1/10.

Is the distance between the center lines of columns of two adjacent interior rigid frames.
Most economical range of interior bays is the 7.5m and 8.5m. however, the common interior bay lengths in the industry are 6,7.5, 8 and 9, and 10m. Maximum economy, limit the end bay length to 6 meters or less and use bypass end walls girts.

Flush endwall girts : the distance from the outside of endwall girts to the center line of the columns of the first interior rigid frame.
By-pass endwall girts : the distance from the outside of endwall girts to the center line of the columns of the first interior rigid frame.

Eave height, is the distance from finish floor level to the top of the outer point of the eave purlin.
Clear height, is the distance from finish floor level to the knee where the column and rafter connect.

Is the plane of the out of secondary “Z” and “C” members.