US Court of Appeals upholds that building codes and standards incorporated into US law can be freely disseminated.
https://www.eff.org/press/releases/appeals-court-upholds-publicresourceorgs-right-post-public-laws-and-regulations
ASCE 7 cl. 12.10.1.1 provides an equation for diaphragm design forces (Fpx) but also says they shall not be less than the forces from the structural analysis. Often, this is taken as the equivalent static force (Fx).
I am wondering if anyone uses the results from response spectrum analysis for...
Anyone know of a simple way to get the total force transferred between walls and diaphragms when utilizing response spectrum analysis?
If it were static or time history, I could subtract the shear in the walls above/below the diaphragm. But in response spectrum analysis this isn't quite...
Just came across this on twitter, thought eng-tips might find it interesting.
Minimass Beam
Twitter Discussion
I don't really like this particular product, but I do like seeing people attempt innovation in our industry. Also, I don't understand the attempt to shoehorn 3d printed concrete...
I've been working on a column design tool for calcs.app [Link] and have the basic functionality in place, but there's still work to be done. Current TODO list includes:
-Toggle for canadian / american code (currently only Canadian).
-Toggle for metric/customary units.
-Biaxial bending /...
Contractors often request to use stayform at construction joints, and I've heard from both engineers and contractors alike claim that it alleviates the need for an intentionally roughened surface or keyways.
However, I can't seem to find any justification for those claims.
Anyone have...
Does anyone know of any references for designing something like a concrete reaction floor and 'strong wall' for a structures lab? I realize this is probably too niche to have its own guidelines, but perhaps there are references for structures with similar design criteria. The basic scheme is a...
As the subject states, I'm wondering if there is anyone out there killin' it with a small company that has some of these attributes:
- Low overhead. Perhaps everyone works from home.
- Low headcount.
- Focus on project quality rather than quantity. Very selective about client and projects to...
What follows is a rather boring but important topic.... How do you document your standards?
My engineering team has a lot of Tribal Knowledge, AKA a lot of unwritten procedures, pseudo-standards, and ways of doing things that aren't well documented. A new hire has no way of absorbing this...
Situation: I'm running dynamic (earthquake) analysis for tall buildings. Floor slabs are modeled as elastic shell elements with a nonuniform distribution of nodes (ie not a perfect grid). Because of the limitations of the analysis software, I only have access to the initial coordinates, time...
The contractor for one of my projects missed a bunch of embed plates for canopies at the ground floor. Because the plates are exposed finish, they really want a fix that does not have bolts+nuts showing, and are asking for something like a plug weld to epoxied anchors.
My immediate concern is...
Does anyone know of any examples or references that describe buildings with dual risk categories?
We are doing a performance-based seismic design in California, and would like to propose splitting the project into two risk categories because of the different usage and structural configuration...
I have a displacement profile (displacements at every story) that I would like to impose on a gravity frame model. Does anyone know whether this can be done in ETABS?
I see there is an option for joint loads > ground displacements. But that seems a little weird to add a restraint and then...
