I have detailed a welded moment connection between steel column and beam flanges with backing bars. I have also shown for the backing bars to be removed and the welds to be back gouged and re-welded as necessary. However I'm thinking this is overkill as the project has been designed with R=3...
I was on a site today where it was noted that rebar with two different deformation patterns were present. One set of bars has deformations perpendicular to the bar's long axis while the other bar's deformations are at a diagonal to the long axis. The contractor said that every time they...
I'm a structural engineer who designed a galvanized structural steel tower (exterior) to support a storage tank a year ago for an industrial process client. They contacted me recently and said there had been a limited leak of 6% sulfuric acid from the tank equipment onto some of the galvanized...
I'm working on a multi-story building that was constructed in the early 1900s. Exterior walls are stone. Interior framing is wood joists with steel girders and columns. The roof is gabled with several dormers. In the attic, I ran into this wood roof truss with a pipe "hanger" (see pic) which...
I am trying to analyze the capacity of an existing joist within a building of which the original construction drawings are dated January 1974.
The framing plan indicates "36H13". When I go to my 50 Year Steel Joist Digest by SJI, I find "H" joists in the May 1971 load tables but they only go...
Working on a renovation project in which the building is comprised of a cast-in-place concrete joist and beam system. The original construction documents provide the beam and joist sections and reinforcing bar information. My confusion is in the way the reinforcing bars are termed. They are...
