Where is the link to delete an account? I'm hoping I won't have to do this after my third visit here in 24 hours to try to stop the avalanche of unwelcome, unrequested emails, but I'm beginning to lose hope. If I do want to delete my account where is that link hidden?
There's an experienced P.E. posting videos on how to grow an engineering career with good, insightful advice on the regular. Most of the engineering videos out there are aimed at technical explanations and attracting youth to engineering colleges - it's nice to see some content that is...
We've got a situation where a possible foundation solution consists of running a large grade beam across the top of two drilled shafts, something like an upside down "U". My question is whether or not we could consider the end bearing of the drilled shafts to be combined with the shallow bearing...
I'm looking for everyone's thoughts on subjecting engineered lumber to exterior exposure. On more than a few occasions now I've encountered situations where conventionally available dimensional lumber (<= ~3-ply 2x12) is not structurally adequate in an exterior exposure setting. LVL, PSL and...
I am evaluating a circular concrete tank roof. It is (was) a flat slab sloped in one direction at an initial (design) slope of about 1/16" per foot. It now has 9.5 inches of sag at the center, equating to L/67.
Without putting pencil to paper I know something has to be done. However, just to...
I'm working with a 90 year old composite mid-rise in Alabama. I actually have drawings!!!
The drawings for the concrete joist floor systems use the following nomenclature in the Slab Schedules:
Tile & Joist:
T. + C. = 6" + 2-1/2"
Joist:
5" @ 25"
Then in the framing plans there is...
I was asked to review another's design for attachment to an existing concrete curb. The 5000# load is for direct suspension of personnel. See sketch.
My initial response was that you wouldn't want to load a curb that close to a free edge in this fashion. The designer wants this backed up by...
I'm working on an aging tank with significant loss of shell thickness. There is slated to be shell replacement in the future, if not total tank replacement. In the meantime, there is a need to increase the vertical buckling capacity of the shell as a whole.
I've been given the task of...
In reading AISC 360-05 (13th Edition) I'm a bit confused on Chapter J: Design of Connections, section J2.4 Weld Strength. After the basic Rn=FwAw equation there's a statement, "Alternatively, for fillet welds loaded in-plane the... strength... is permitted to be determined as follows." It then...
I've designed several "roof-top deck" structures for 100 year old, brick town-square buildings recently. The structures are stand alone (from the brick building structure), with columns extending down to new foundation. BUT, they usually have very large live/dead load ratios and they have...
I am designing some three-story, light framed (wood) apartment buildings. The contractor wants to use flat strap bracing as opposed to sheathing on "shear walls".
I was provided an old set of drawings indicating Kant Sag flat strap "wrapped around" the bottom and top plates. I contacted USP...
I was on a scissorlift looking at a gym PEMB frame last week. It was fabricated and erected ~late 60's - early 70's. It is a typical bent with tapered columns and gabled, tapered beams. The clear span is about 108'.
At the column-beam joint there is an odd condition I've never seen. There...
I was wondering what software was being used to track jobs. I could spend a good bit of time and create a database, but I'd prefer to buy a package. I hear that Microsoft Project is good, but we don't want to have to buy Server OS for our server machine here.
Any suggestions?
(p.s. This may...
I'm looking in to converting a cross-plane V8 to a flat-plane. Specifically, the Toyota/Lexus 1UZ. I understand the basics of difference between the two configurations but was looking for recommendations on engineering the balance shaft(s).
I have the CAD/CAM, engineering and...
I am designing a retaining wall/dam for a detention pond. I've got everything covered except movement joints. I usually approximately follow CRSI's recommendations for contraction & expansion joints in retaining walls. None of my wall sections are over 50' long so I wasn't planning on...
OSHA/AISC requires one bolt in solid webbed bracing members for erection purposes, but can the final connection only utilize one bolt? I don't like the idea of any connection relying on one bolt, but this is not my design... just a review. I've searched this site, the web and the AISC manual...
I've got a very unique structure that has a semi-circular cross-section slab that goes from vertical (wall) to horizontal (floor) with a radius of curvature ~30'. In order to cast it forms were placed on top and shotcrete was applied from below (wet mix, 4000 psi, fiber reinf, fly ash, 3/8" and...
When designing the foundation for a building (such as a PEMB) with monolithic slab & footings (thickened slab footings) do you and how do you consider the eccentricity of column axial load on exterior & exterior corner footings?
I know this is in the "grey area" between this forum and the...
I'm taking the April SE1 exam and was wondering if anyone had bought Subasic's, "Six-Minute Solutions for Structural I PE Exam Problems" and NCEES', "NCEES Structural I Engineering Sample Questions and Solutions" books and whether they were worth their price.
I've searched the archives and have found lots of useful posts, but I have a few add'l questions.
The trusses are ~180' (55 m), simply supported on cast-in-place concrete columns, top chord bearing.
- Considering the case of a fire, what temperature difference should we use to size end...
