ASCE 7-98 Drifting
ASCE 7-98 Drifting
(OP)
Drifting is computed using the length of the roof upwind of the drift, lu per figure 7-8, ASCE 7-98.
If you have a parapet perpendicular to the wind direction which blows the snow off of the upper roof, can the distance to the parapet be used for lu?
If you have a parapet perpendicular to the wind direction which blows the snow off of the upper roof, can the distance to the parapet be used for lu?






RE: ASCE 7-98 Drifting
RE: ASCE 7-98 Drifting
Also, note that you need to also include windward drift (see Figure 7-7)
RE: ASCE 7-98 Drifting
RE: ASCE 7-98 Drifting
JAE, I am aware of the windward drift requirement.
I would think that the parapet would block some of the drifting potential, but the code does not mention whether this is allowed.
RE: ASCE 7-98 Drifting