Question: Is it acceptable to design a wood beam for the shear at 'd' from support?
I researched this topic, here and elsewhere, but was unable to find a good answer.
This thread (http://www.eng-tips.com/viewthread.cfm?qid=21883) had good explanations for steel and concrete, but wood fell off...
I agree for the multi-story system, so let's just stick to single story where there is only one diaphragm loading the shear wall. This example could also be considered as the top story of a multi-story building.
Is there anywhere that this is stated as acceptable? Both AISC and AISI allow...
...not seen anything explicitly or implicitly saying so, this is a common practice in steel and, IMHO, meets the intent of the code.
A related question: ASCE 7-10 §12.10.2.1 exception 2 states that we only need to design using rho*Fpx when using exclusively light-frame shear walls. Is that true?
None that I know of. It's very typical for 3rd party programs to have their own header. It helps the plan checker know that the engineer is using a program instead of their own calculations and gives it some trust. Without the header, a plan checker might ask what the program is, how it...
Sorry to show up late. There is a lot of interpretation with what is applicable when using bearing plates.
ACI 318-11 is a little more explicit with what is applicable. D.2.2 specifically says that multiple anchors connected to a single steel plate are not applicable, and D.2.3 does not...
That was a lot of reading!
The 1997 UBC designs for Life Safety, so if you can prove that it was in-fact designed for that code then you should be in the clear. Otherwise you will have to use ASCE 31 to verify the building.
I couldn't tell you about the other forms, I have only limited...
My firm currently has a whole suite of LISP routines that make drafting very fast. I'm looking into improving it as we are branching out into newer areas, but without this automation you're really hurting yourself for time.
I recently looked into lateral bracing of steel beams. Per AISC, I need to brace both top and bottom flanges.
I wanted to check the stiffness of just using stiffener plates to brace the bottom flange when the top flange is fully braced. See attached.
When I check it this way, the stiffness...
Some engineers just call that a miter joint, but I would be more specific. Full CJP welds all around. Since the 12x6 is slanted, they can line up all 4 sides with the 6x6 tube.
Retain-Pro is the one you can tie into Enercalc, right? I've always hated their UI and complexity, it makes it very easy to miss something or make mistakes.
I have always used a custom spreadsheet. However, we have recently looked into the Tedds software. They have modules much like Enercalc...
If you have a heel, then your angle of friction would indeed be through the soil instead of at the face of the concrete. You still have static friction to overcome before there is movement. I wouldn't know how to quantify that friction, as I'm very inexperienced in soil mechanics.
The soil...
It's also called bridging. A few manufacturers now have both bridging and blocking for metal studs that is very easy to install.
A typical detail is to use pieces of track between the studs, where the web is bend up and screwed into the web of the studs while the flanges go straight and are...
I ran across something interesting lately. An engineer that uses friction on the face (dirt side) of a retaining wall to resist overturning.
It is interesting because I have never seen this. Even asking other engineers and searching all around the web and my reference material, no one uses...
It seems like a quick fix and does not address the decay issue that caused the original balconies to fail.
I have never seen a fix where they screw into the end grain of the existing joists. I think key (may I call you key?) had some good points and it can be validated, but it does make some...
Sorry for the late reply.
I don't usually download and check models, but I made an exception and ETABS said it could not open the file. Oh well. :D
If it's your first model, you have a lot to learn about modeling in general. Most engineers are not taught what they need to know and it can be...
Sorry for the late response, I've been busy. I don't think I have any more reasons than what I already mentioned. Summing up:
--Separate permits (building was split up to speed up plan-check, design, or construction time).
--Irregularities (you mentioned there were none, but unless the...
