Looking for a gut check to confirm an equivalent mechanical fastener attachment pattern to using 5/8" puddle welds at 8 inches on center. The situation I have is connecting new metal deck to existing metal deck. I came up with #10 screws at 3 inches on center is equivalent to 5/8" puddle welds...
I am working on a project that has a typical detail showing added rebar around openings blocked out prior to slab pour in composite slab on deck. The detail shows the maximum size of the opening as 4 ft perpendicular to the deck span. Are there any limitations to the size of the opening parallel...
I am trying to prepare for the PE exam and wanted to do a hand calc of a typical 6" hollow CMU block with 1" face shell.I am assuming that the CMU block is hollow and does not have any grout. NCMA TEK 14-1B provides Inet of 130.3 in^4/ft for a hollow 6 inch CMU block wall with 1 inch face shell...
I need to provide an attachment detail for dens glass sheathing at window heads that have HSS steel headers (not typical Cold Formed Studs) and the contractor has requested powder actuated fasteners. I found a nice self-drilling Hilton fastener (Kwik-Flex) with an undercut head to allow for the...
Why does steel flake when it corrodes from a metallurgy standpoint? I was in a below grade steel framed parking garage where all of the beams were fireproofed. I noticed that several beams were visibly wet (fireproofing was soaking) and in some cases the fireproofing had popped off the beam. At...
I recently came across a detail for a project a principal in my office is pier reviewing that calls for two #4 bars at all sides of an MEP opening in slab on deck. Rebar is to extend 3’ past the opening on all sides and max opening is 18” perpendicular to deck span.
Can someone explain how...
I’m working on a project with a senior PM in our office that’s composite steel framed construction with slab on metal deck. During the pre-construction meeting we had for slab placement the contractor took issue with our specification that states: the placing contractor should assume to add an...
There's a project in my office that is in a low seismic area and is using conventional structural steel with composite slab on metal deck and ordinary braced frames. I was helping size base plates and bearing plates during some last minute detailing before the project went out the door and...
Hi,
I'm working on a project that is a building re-model. The building is an early nineteenth century brick masonry structure (4 stories) with timber framing at the interior. The building is being transformed to a library and will use the "box in a box" approach where the existing three-wythe...
Hi,
I'm trying to learn about connection design. I'm a new structural engineer working on a lot of CA and shop drawing review. The engineer has calculated a number of limit states for connections involving Snet including Coped Beam Flexural Rupture. Plate Flexural Buckling, and Coped Beam...
