00:01
In this case, we're given this tower structure here.
00:05
And for problem 61 and 62, we're asked to figure out some of the stresses in some of the members here.
00:14
So i'm just going to solve for both of them.
00:16
I'll solve for the reaction forces down here at j and k.
00:21
So we have a pin here and a roller here.
00:25
And if we just go through that, again, we can do some forces and moments, take moments about this point and we can just go through that three equations and three unknowns and we wind up with these reaction forces here minus 15 kiloons for this guy which is basically just offsetting these three five kiloon loads and then these two must be equal and opposite and they counteract the moment regenerated by these loads here so this would be like a build with some wind loads on it.
01:02
So we're gonna have compression, yeah, we're gonna have, well, the force on the structure would be in forcing up, but if there was a member down here, then that would be pushing down on that member, and then this one would actually be trying to pull up on the pylon...