Need a book? Engineering books recommendations...
Re: Engineering judgment[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Engineering judgment
- From: Scott Maxwell <smaxwell(--nospam--at)umich.edu>
- Date: Sun, 14 Mar 2010 00:40:14 -0500
|For the footing, there is more than just the bearing pressure to be concerned about. Can the strip footing handle the shear from a 4.5 k point load? What about bending of the strip footing? Even if the bearing pressure is fine, is there a concern about settlement or differential settlement issues? Keep in mind that bearing pressure is not really a "this is the safe load it can support" value but more of a "this is the load it can support with acceptable settlement/compression of the soil". Thus, the point load could cause some sort of differential settlement that might cause issues else where.|
For the shearwall, again is it not just the capacity of the shearwall. What about uplift forces at the ends? How will those uplift forces be transmitted down to the foundation? Can you achieve realistic connections from the end posts of the shearwall in tension to something at the lower level and then from the lower level into the foundation? Same for compression post forces at the ends. Can you design the diaphragm and/or collectors to fully get all the load into a 6 ft length of wall? And as someone mentioned, what about construction quality issues (those shearwall code capacity values assume pretty much "perfect" construction)?
My point is that based upon the limited information your provided there seems to be things that you may not have looked at that could be why your boss changed things.
As someone else suggested, ask your boss if he can explain why he wanted the changes that he wanted. Phrase it not as if your are questioning what he did but that you are asking so that you can understand why the changes where needed so that you can learn from this and maybe "do it right" (so to speak) next time. Not everyone tends to treat such situations as ways to teach stuff unless you "force" them to...they tend to focus more on "getting it done".
- Engineering judgment
- From: erik_g
- Engineering judgment
- Prev by Subject: Re: Engineering judgment
- Next by Subject: Engineering News Record Editorial of 6-2-10
- Previous by thread: Re: Engineering judgment
- Next by thread: Re: Engineering judgment