Search results for query: *

Derb: I think your original question is clear to say that there exists the possibility of drifting and sliding. I would say common sense says that they must be superimposed with all other loads that act upon the structure at the same time. I would not try to reach any compromise short of this...

111213: Would you expand on your explanations?

Diaphragm actions in a roof A typical horizontal diaphragm can have an allowable shear value. Let’s take a hypothetical horizontal diaphragm in service under following conditions and examine the allowable shear values. Are there modifications to allowable values when the horizontal panel is...

Wow: 51' sounds like a bridge span!

Jike & 111213: I have felt the pressure to "measure down" to those that under-design. It also the case that these encounters have been builders of smaller buildings. You are also accurate that the engineers that have given into this are often the less pricey ones. It is possible that they can...

Thanks 111213 Given what you said, what do you do? Do you allow your clients to go to others that under-design or did you try to fend for yourself and point the inferior design to stakeholders, thus exposing others, possibly getting a chance to retain your client, and certainly dealing with the...

I work in a market that includes engineers that routinely under-design the buildings they engineer. Specifically, I seen many designs that are based on moment arms for overturning that are shorter than where they must be. I have seen designs that calculate uplift forces for shear walls...

Does any one have any suggestions for dealing with this? Do I go to the building departments and ask them if they sanction the practice that my competition engage in? Do I just let my clients go off to those that are exposing themselves as well as my client to potential liability? Am I obligate...

Looks like that what I have been doing all along is right. The answers above seem to confirm that we need to keep the roof vertical projection into account when calculating uplift. Funnies that it looks like that some of our colleges seem to differ on this practice. I have lost two good clients...

Thank you apetr26542 (Structural) Given what you stated, what do you mean as the mean height? In other words what do you chose as the moment arm for a one story building with top plate at 10feet and mean height of the roof at 8 feet above the top plate? Lets say the weight of roof is 5 times...

Why do we assume that the roof lateral forces act at top plate level and not at the center of gravity of the roof? Since the center of gravity is somewhere above the top plate level, it seems logical to assume that this force acts with a moment arm that corresponds to its center of gravity...