strguy11
Structural
- Nov 29, 2005
- 232
In reviewing a roof plan with a relatively flat roof (typical office building structure) the roof slope is created by lowering the columns at interior bays. This results in about an 8" fall from the exterior wall.
However, there is only one drain shown at each location, and no overflow drain. Therefore, it seems this is very likely to have ponding problems, since the only overflow drain is a scupper on the exterior wall.
If a secondary drain was installed next to the primary drain, would this suffice to eliminate the ponding problems? The code says to assume the primary drain is blocked, however, I dont see any items regarding placement of the secodary drain. My thought was to install the secondary drain about 2" higher than the other, therefore, only needing me to check for 2" + localized pond, instead of an 8" pond + resulting beam deflections. Any thoughts?
However, there is only one drain shown at each location, and no overflow drain. Therefore, it seems this is very likely to have ponding problems, since the only overflow drain is a scupper on the exterior wall.
If a secondary drain was installed next to the primary drain, would this suffice to eliminate the ponding problems? The code says to assume the primary drain is blocked, however, I dont see any items regarding placement of the secodary drain. My thought was to install the secondary drain about 2" higher than the other, therefore, only needing me to check for 2" + localized pond, instead of an 8" pond + resulting beam deflections. Any thoughts?
