Converting Roof Live Loads Down a Slope Member
Converting Roof Live Loads Down a Slope Member
(OP)
I am trying to teach a new engineer the process of converting roof LL down a sloped member for bi-axial analysis/design. I know the code states that LL acts vertically along the horizontal projection of the member which means that this load has to be converted [cos(theta)^2] to act along the length of the member and perpendicular to the member. However he is having trouble grasping this concept so I began to sketch the process and prove it through trigonometry.
I can visually represent the conversion from the length of the member to act perpendicular through trig, but I seem to be making a mistake or not thinking about this correctly when converting the first step (from the horizontal projection to the length of the member). Does anybody know a good reference for this topic or can provide any assistance?
I can visually represent the conversion from the length of the member to act perpendicular through trig, but I seem to be making a mistake or not thinking about this correctly when converting the first step (from the horizontal projection to the length of the member). Does anybody know a good reference for this topic or can provide any assistance?






RE: Converting Roof Live Loads Down a Slope Member
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Converting Roof Live Loads Down a Slope Member
RE: Converting Roof Live Loads Down a Slope Member
RE: Converting Roof Live Loads Down a Slope Member