When ever i need to actualy design somthing instead of look it up in a table, i refer to the classic "Design of Welded Structures" Bloodgett, Section 6.4 - "How to Stiffen a Panel" could be a good start.
I typically treat the live load on a deck as a roof live load (Lr), my reasoning is that a exterior deck is very similar to a promenade (you might have a couple guys out side during your snow event but you're not going to have a deck party). This gives you:
D+Lr or D+S
D+0.75Lr or D+0.75S
I...
How much consideration does everyone give for providing physical room for the compression brace to buckle? Off hand i can't think of a situation were allowing the compression member to develop some loads but. . .
nitnelion
i belive that Mf reflects the condition that you are 'forcing' the plastic hinge into the beam away from the connection. The prequalifed connection testing and design critera are to ensure that significant plastic deformation occurs away from the connection and in the beam section. I...
remember the accelerations on the map are for the ground, and the accelerations used in the IBC are spectral accelerations (idealized building accelerations)
The top portion can be designed as a large rectangluar box but the challenge is when you get to the fire box where your gross section changes. I deal with a lot of double sided fire boxes and end up with a very odd section that requres diligent detailing around the lintel and down into the...
CMU Chimneys are a black box of mystery
I think you may find designing a single vertical CMU wall for the anticpated loads very difficul on uneconomical. You may have better luck using the gross section of the CMU. In which case you need to consider the out of plain seismic foces iparted to...
Drinking isn't just limited to a p-delta proplem it also has nonlinear materal properties.
CJSchwartz - I agree that the references suggest that a stress increase for typical headers is appropriate. I feel this would be fine to incorprate into the IRC header tables where there are prescriptive...
I had a quick discussion with the office and we are in support of JAE's conclusion. While we think you could 'fool' the building code offical into accepting the actual wording of the NDS, it is not the intent of the repetitive member factor. We feel the Cr factor is more related to load...
This is a great program that I have worked with in the past, shoud provide you with some information.
http://www.wti.montana.edu/Education/OutReach.aspx
I think what you need to take away from this is the difficulty in explaing ideas to people when they seem obvious to you. (i'm sure everyone here has had a brillent professor who was a poor teacher) Its a life skill, you use everyday, coworkers, aritechects, significant others. Personally my...
from what i have seen the typical approach is running the log through a saw mill, splitting it in two, then chain saw a cavity for the HSS, finally glue the two pieces back together. It depends on the contractor and the exact usage but sometimes they do all of this in the log yard and ship the...
We do a fair amount of log/timber work and our specifications call for standing dead timber, of a certain species and grade. We use conservative stresses for each species and specify the minmum butt diameter. While the engineer should always consider shrinkage, this typicall becomes a...
