What you want to know about "the course design of steel structure, the roof slope is 1: 9, and the mid-span height is calculated as a decimal, how to get the value", I can only give an example.

1. If the project is a steel roof truss workshop with a span of 18m and a slope of 1: 9, the distance from the roof watershed to the side column is 9m. According to the roof slope of 1:9, the mid-span height is exactly1m.. If the supporting height of steel roof truss is 1.2m, the height of mid-span roof truss is 2.2m. ..

2. But if the mid-span height you mentioned is a decimal, then the span of the roof truss is not exactly what I said 18m, but 24m or 30m (generally, the span modulus of larger steel structures is 6m). If 24m is considered, the distance from the roof watershed to the side column is 12m, that is, 1:9. If the supporting height of steel roof truss is still considered as 1.2m, the height of mid-span roof truss is 2.533m ..

When the mid-span height encounters decimals, the value principle is: accurate to millimeter.