I am looking for opinions others may have for "clean" stone acting to withstand building lateral loads. The site condition I am analyzing is the passive pressure of a 12" layer of clean stone as a result of lateral forces from grade beams. To describe the constraint conditions, there are...
I was looking for some suggestions on timber pile protection at the cut off. Our spec's call for (3) coats hot creosote followed by one coat of coal tar pitch. The contractor pouring the pile caps and grade beams would like to use the creosote and substitute the tar with a 15# felt. Is this...
I was curious as to why the pass rates for the Structural I test was so low?
It is even lower then the Structure II pass rates.
http://www.ncees.org/exams/pass_rates/#pe_pass_rate
First Time Repeat Takers
Structure I 45% 8%
Structure II 49%...
What is the weight of a piece of rebar? (#3, #4, #5, #6, #7, and #8)
I am also curious as to the comparitive price/ lb of rebar to W steel beam shapes. Just trying to get a feel for the cost with the rising steel prices.
Thanks
What is a reasonable amount of due diligence required to determine a site class (IBC 2000)?
As a structural engineer, is it an appropriate request to ask for the shear wave velocity from the soils engineer of record? Can this be estimated?
My experience, utilizing the IBC code, is that...
Prior to setting interior load bearing walls on an elevated slab constructed with composite steel floor joists, what is an accepted minimum compressive strength for the concrete?
TIA
I have a technical question with regards to calculating the compression forces in columns at "tension only bracing" intersections.
The bracing is for townhouses with steel stud walls. They are straps, welded at the intersections, and tack welded to each stud. For simplicity, I...
Is an expansion joint required for long piers.
A pier constructed of PPC piles, cast in place pier caps, a system of precast planks supporting a road and townhouses, will be 80' wide and 430' long. The location will be Maryland, over water. Do you feel an expansion joint is required?
I...
I am curious to know how others have detailed pre-cast piles to the "poured in place" cap?
I am looking for an equivalent shear connection to (4) #9 hook bars which are epoxy grouted into pre formed holes. Possibly a more economical approach. The piles are 20"x20".
Thanks...
I am looking for other peoples interpretation of section 2305.1.5 of the IBC 2000 regarding use of plywood shearwalls... then compare that section to 2305.3.1.
Section 2305.1.5 rather clearly states that "Wood shear walls,... shall not be used to resist horizontal seismic forces...
I am interested in any published articles or codes referencing seismic design parameters for a building supported on piles.
A quick scenerio of a particular building I am working on is this:
The soil is classified as S3, per BOCA 1996... the soil beneath this 4 story building is 10' landfill...
I am looking for any code or basic design standards which might conflict with the following scenerio.
Following my clients recommendation, I am utilizing an ivany block, 12" wide, as structural columns in a four story building. The veneer of the building is brick on the second and third...
I am analyzing a buildings diaphragm based on computed direct shear and torsional shear.
Scenerio:
8" Hollow core planks with 2" concrete topping.
Question #1:
When designing the chord beam for tension, do you only consider the ultimate moment from direct shear??? Can the torsional...
What is reasonable settlement for a 25 ton pile? Has other engineers designed buildings for an expected settlement in excess of 2"? Did differential settlement occur after construction?
Say a proposed 4 story building (with full garage), is estimated to settle 2.3 inches over 30 years...
What is the appropriate size weld for a connection between a metal track (12 or 14 guage) and a TS 5x2x3/16? The application is the tube will be the bearing plate for open web steel joists. The joists will bear on the tube, which I would like welded to the top track of a 6" metal stud...
I have heard of increasing allowable values for nails when the backs are clinched. The most common application I can think of is for wooden roof truss repairs. Can someone direct me to any literature or design guides which implement, and validate, the increased load capacity for common nails...
When performing a rigid diaphramn lateral analysis utilizing only 3 exterior walls, what is the eccentricity when considering lateral restraint in the direction of the one wall? Is it the width of the building?
How can this eccentricity and now a calculated torsional force be applied into the...
Is anyone familiar with a material which could be used as a steel shim substitute?
The scenerio is a failed concrete column with a square steel column wrapped around it as a fix. At the top was a fabricated cap plate which was intended to have full bearing with a steel beam bearing plate. The...
Is their a quick, relatively accurate way to compare a steel pipe pile filled with concrete to an HP pile?
Is the relationship comparing the two I/r values a simple, somewhat accurate way to find equivalent strength comparisons?
Thanks for your time.
Mark
