Hello,
I have a situation where I need to install bottom cover plates on steel beams over an area where it would be extremely difficult/expensive to install shoring under the beams. The undersides of the ends of the beam are accessible, but not the main 30-ft span.
My understanding is that it...
Hello and forgive me for what you may consider a silly post...
My work requires that sometimes I need to evaluate existing structures. I have done that with many different material types.
With open web joists, there is almost always a metal tag somewhere on the joist that tells the manufacturer...
Wondering if any of you have specified HDPE or PVC sheet material for a v-notch weir in a wastewater clarifier. I have almost always seen steel or aluminum or fiberglass in the field, but I would think that HDPE or PVC would be cheaper and more resistant chemically. I know there are issues...
Hello,
I am investigating a very old clarifier mechanism in a gravity thickener tank. The unit was probably built in the 1970's. There are no shop drawings or records of construction. The mechanism is basically welded steel trusses made from small carbon steel angles, 1/4 inch thick. There...
For decades, the standard rule of thumb on a concrete block foundation has been 3 to 5 times the weight of the machine.
I have never really seen it clearly stated as an assumption, but I have always assumed that the underlying assumption is that this is valid when the equipment is solidly...
I am curious as to what folks in this forum are specifying in regard to this issue. In my own specifications, I require a depth of embedment such that the bar develops 125% of yield strength (ala ACI 318-05, 12.14.3.2). In doing this, I am basically saying that I want the same kind of...
There seems to be a slight contradiction in ACI350-06.
R4.8.3 — Sealants
"Non-sag sealants are recommended for submerged service. Polyurethane sealants, single-component, and two-component are recommended. Polysulfide sealants are not recommended when the sealant is in contact with wastewater."...
Hello all,
This is a link to see the most current ICC approvals for "Concrete Anchoring":
http://www.icc-es.org/reports/index.cfm?csi_num=03151&view_details=yes
Searching this list, I find only one adhesive product with a current approval. (I'm not trying to advertise for anyone, so I'll only...
Greetings,
I am wondering if anyone has any thoughts on hip roof unbalanced loads with ASCE7-05.
Reading 7.6.1 and C7.6.1, I see the words "For all other gable roofs..." before the discussion of drift loads. Maybe it's just semantics, but it seems the paragraph heading includes both "Hip and...
Hello,
I just posted a question to 'Geotechnical engineering other topics' but it is really a question that might also be answered by a structural engineer, I think.
Please see
thread274-192202
and respond if you care to.
Thank you very much.
Hello all,
I couldn't think of a better title for this post - sorry.
Here's the scenario: You're a consulting engineer - hired to issue plans and specs for a project. A geotechnical investigation is undertaken and the geotech firm drills some borings. They find groundwater several feet...
Does anyone have an opinion about the "real world" kind of forces involved in operating a sluice gate?
I am familiar with AWWA C560, Appendix A, and I can use that to come up with a number, but what about a 'stuck' sluice gate?
If I have a concrete corbel holding a sluice gate stand and the...
After looking through several ICC-ES reports from several different anchor manufacturers, I find that ALL of them require "special inspection" for their allowable load tables to apply.
I don't have a problem with this, since I have witnessed some horribly poorly installed adhesive anchors that...
Back in Feb. '05 there was a thread entitled "Concrete Mix Design". (thread507-116513)
The question was, "Does anyone know if ACI specifically says what must be included in a concrete mix design submittal?"
Several replies were offered with people's individual experiences in this regard...
Does anyone have a rule of thumb for this? (something like 'a mechanical splice costs about the same as a XX diameter lap splice')
I've tried contacting splice vendors for cost info, but I'm really more interested in installed cost of a mechanical coupling compared to the installed cost of a...
Hello.
I know this subject has been talked about somewhat from time to time. Still, I have had such pathetic experiences with getting contractors/concrete suppliers to submit what I feel is a "proper and complete" mix design submittal, that I am compelled to bring this up again.
I am a...
Please forgive the simple-minded question, but can someone please help me locate the web site for the State of Arkansas Building Code?
What I have determined so far is that Arkansas is following the 2000 IBC with additional "2002 State Amendments". These amendments also appear to go by the...
Situation: 2 10' diameter plastic tanks for ferric chloride storage in a concrete/masonry room .
Question: if there are aluminum doors, louvers, ductwork, stairs, etc. in the same room (not in the containment area) will they be attacked in some way? There are metering pumps to pump the solution...
Inspection company wrote up a report on a 1960's vintage elevated steel water storage tank. Long laundry list of items that need to be done to bring tank into compliance with AWWA, OSHA, etc.
My question is - how do I find out how many of the items on the list are really required and how many...
