I actually did some FRP strengthening of concrete back in the day BEFORE 440.2 was available, when you had to use data and procedures provided by the system manufacturers. On one job, in fact, we actually enlisted the aid of Antonio Nanni, then at Missouri-Rolla, who is now the ACI President...
I'm attempting to source very long (> 80 inches) structural bolts with weathering properties. I want headed bolts for ease of assembly and to avoid interferences.
In speaking with a manufacturer's representative, ASTM A490 Type 3 bolts could theoretically be speciied but since these have to be...
I've been looking over a few of the packages for structural engineering examination (SE) review courses, and it's difficult to determine which of them to spend money on. I'd like some recommendations for people who've attended such courses.
"No one is completely useless. He can always serve as...
The definitions of some terms in this section, provisions for "Development of standard hooks in tension," seem unusually complicated. Usually, ACI does a fair job of including accompanying illustrations or diagrams to help understand how physical parameters are defined, but in this case it seems...
Performing this design calculation, I was struck by the strange "murkiness" of the requirements for shear capacity of the beam web. The pertinent explanatory paragraph of the Design Guide 4 (Second Edition, published March 2015) is as follows:
"Only the web to end plate weld between the...
I'm trying to design a structural frame for a piece of vibrating equipment. This is the first time that I've encountered dynamic loading outside of seismic (which has its own very well-defined and quite elaborate rules) that potentially govern the design, and it's not clear how to handle it. I...
thread507-446784
I take particular note of the referenced thread (now closed - why do they close them so quickly? This one is about a year old and didn't receive nearly the attention it might have otherwise) and wish to make a couple of observations.
First observation: the OP states that "if...
I recently completed an online course to earn 12.0 PDHs to satisfy my continuing education requirements for the various state licenses I currently hold.
In addition to the 12 PDH credits, they issued a separate certificate for 1.0 Equivalent Education Units. The certificate confirmed that I had...
I am working as a structural engineer for a very old processing plant. One of my main responsibilities is investigation of existing structures either to repair damage accruing from materials having reached their safe life expectancy, or retrofit to support new equipment installation.
There are...
This is referencing thread730-373612 which is a closed thread.
I am contemplating moving to another state from my current Texas address. I've lived here for 22 years, and loved it, but (according to She Who Must Be Obeyed) it's time to move on.
The new state of residence happens to be one of...
In doing a brief visual inspection of some steel floor framing erected over ten years ago, I came upon this rather strange-looking "material" at the location of a rather hack field weld.
Bearing in mind that this location experiences frequent high ambient relative humidity owing to exposure to...
I am interested in learning strut-and-tie modeling (STM) for the analysis and design of reinforced concrete.
STM has been a "thing" since at least the late 1990s, and has actually been incorporated formally into building codes via ACI 318 and other national codes for nearly 15 years. But as...
I have an application where I've got some FRP Angle pieces I need to attach to uncracked concrete. I had thought to simply use expansion anchors, but wondered if there might be someone who makes fiberglass (FRP) versions of those, or if I could simply epoxy them into place similar to HILTI...
I've got a 20-ft deep underground vault, about 30 ft by 40 ft in plan, open at the top, formed by driving sheet piles in a box shape. After excavation, a 2-ft min. thick slab will be poured at the bottom to seal the vault off from groundwater. There is estimated to be about a 16-ft hydrostatic...
I'm not particularly expert on sheet-pile design, know just enough to be able to use the SupportIT software.
I note that the Pilebuck software package SPW911 has a very similar "look and feel" to SupportIT. I believe they both are descended from an old package developed by the U.S. Army Corps...
I have "Googled" to no avail. I would like to know what (if any) building code was in force in Pennsylvania or parts thereof, in the early to late 1960s.
Alternatively, was there a version of ANSI A58.1 (now ASCE 7) extant during that time period?
I'm trying to establish the likely floor live...
