... characteristics like light weight, large span, and structural stability. 2) Also use few materials, and can be used several ... height, roof slope 2)Type: Single slope, double slope, muti slope; Single span, double-span, Multi-span, single floor, double floors! 3) ... : 1. Dimension: Length, width, height, eave height, roof pitch, etc. 2. Doors and windows: Dimension, quantity, position. 3. Local climate ...