It is my understanding that torsion rotation (angular twist) formulas such as those shown in Section 8.2 of "Design of Welded Structures" by Blodgett are only applicable to closed shapes (such as pipes, round HSS, and rectangular HSS) and open shapes where warping is negligible (such as angles...
For those who use Theory of Plates and Shells by Timoshenko, an error in Table 47 of the second edition has been discovered. The error is discussed in an article by Angus Ramsay and Edward Maunder in the July 2016 issue of STRUCTURE magazine (www.STRUCTUREMag.org). The error seems to be...
I am working on a multi-story building project that includes a portion elevated above a roadway/drive aisle and I am seeking opinions as to the minimum clearance that should prudently be provided between the road surface and the overhead structure. The project is subject to IBC 2012 and I have...
I am working on the renovation of a cast-in-place concrete structure that was built in 1953. I have partial original construction drawings but, unfortunately, the drawings I have do not indicate the yield strength of the reinforcing steel. Based on research I have conducted, including reviewing...
I am seeking opinions as to whether the provisions of ACI 318-11 12.14.2.3 can be applied to a column member that is solely in compression. ACI 318-11 12.14.2.3 states:
Bars spliced by nonontact lap splices in flexural members shall not be spaced transversely farther apart than the smaller of...
For those who regularly use ASCE 7 in their practice, do you typically take advantage of the 25% reduction in foundation overturning permitted by ASCE 7-10 section 12.13.4? The same provision was included in earlier editions of ASCE 7 as well. My suspicion is that this provision is not widely...
I am planning to use smooth round dowel bars for shear (out-of-plane) transfer purposes at vertical contraction joints in cast-in-place concrete walls. Basically, I am making the horizontal reinforcing discontinuous at the joints (which include reveals/chamfers on both wall faces to provide a...
Has anyone noticed that Equation (A-6-9) in AISC 360-05 Appendix 6 gives a significantly greater required bracing moment (Mbr) than the equation from which it is derived? Equation (A-6-9) is based on Equation (15) from "Fundamentals of Beam Bracing" by Joseph Yura, 2001, first quarter, AISC...
I am seeking the load requirements (live, wind, etc.) in effect in Florida circa 1966. Does anyone have that information or a suggestion where it could be found? I checked SlideRuleEra's website and did not find it.
In calculating Lc for use in the equations in AISC section J3.10 (Bearing Strength at Bolt Holes), would one use the nominal bolt hole diameter or the nominal bolt hole diameter plus 1/16"? I have notes from an AISC connection seminar (from 2001) wherein it states that for bearing and tearout...
I'm looking for assistance in determining the ultimate torsion capacity of a square steel shaft (1.75" x 1.75", ASTM A29 material). The minimum yield stress is 90 ksi. According my advanced mechanics of materials textbook (Boresi et al, 5th edition), the plastic torsion capacity for this shape...
