Have a 16 ft heavily loaded PSL beam, simple span. Say I want to extend the beam a foot or two to simplify construction, and infill that foot or two. Will the moment cause by that cause excessive uplift or buckling of the trimmer studs? Or should deformation be low enough that it can be neglected?
I don't usually work in freezing locations, but currently working on a house with a 45 degree metal roof, no drift or unbalanced load, just straight 30 psf sloped slippery roof snow load throughout.
1) Is a snow fence really needed on this roof?
2) If we use a snow fence at exit/entries (a...
Wondering if anyone has an answer to this.
Biaxial bending is in chapter 3.9 of NDS. It has F_bE in the denominator of the last term. Go back to section 3.3.3 and this variable is a factor of some other variables:
1) It is a factor of the slenderness ratio, which is otherwise used to calculate...
Wonder how you all detail a holdown anchor through an existing footing.
Do you bolt it directly to the bottom of the concrete and allow deformation or crushing at the rough surface? Do you extend a distance below the footing and cast it in? Is there a need to use rebar or does a block of plain...
Designing a house. There are 8 concealed steel columns and 2 exposed wood columns at the interior slab. Many of the steel columns act as wood shear wall end chords as well as roof support (we have snow load at this location). Originally I have been designing this with continuous footings...
I'm coming across this same issue as in this thread. Shear capacity with the hole is greater than 2/3Vp.
https://www.eng-tips.com/viewthread.cfm?qid=454419
I'm wondering why this triggers a web buckling check, even if there is zero shear at the hole.
I have a compact W8 and a 3 inch hole. It...
We are attempting to provide guidance for anchoring a manufacturer's skylight frame on concrete on metal deck.
The manufacturer's frame has a flange that sits on the rough opening. The flange has holes for 1/2" anchors, 2 1/8" from the edge of shimmed opening. So ~ 1 3/4" from center of anchor...
Just wondering if this is done and advisable in non-seismic areas. I've done continuous footings, mat slabs, and spread footings integrated with continuous foundations. Working on a project in a non-seismic area and the contractor is thinking continuous frost wall around the perimeter, and...
I am required to provide anchorage information for a couple residential propane tanks - 1150 gallons each. They look similar to the tanks you find at the gas station propane refill.
ASCE 7-15 requires 8x diameter gauge for steel anchors in concrete (such as an embedded sleeve), in addition to...
Regarding elements supporting discontinuous lateral systems, I've read tons of prior threads and I think I even made a thread a while back. And it appears just as murky.
This question is specifically about a lateral system supporting a lateral system.
Wood frame shear wall, offset in either...
All over the internet I get different opinions. Contractors on site have different opinions.
The concern with pouring directly on the insulation is cracks along rebar during curing. This slab will be exposed, heated, with no control joints. The architect wants cracking to look natural rather...
Just wondering what you all do when you use structural composite lumber (LVL, LSL, PSL, etc.)
There is a Simpson technical bulletin, as well as a similar sheet by Boise Cascade, and a link to the bulletin on Trus Joist. The bulletin lists reduction factors for various connectors installed on...
I'm confused by this section. I'm told they install these all the time using torque correlation only, but this paragraph appears to require either calculations based on a geotech report or load tests. Is it permitted to EVER use torque correlation only? I'm working on a house with a site...
IN section D2.6 (Column bases), section D2.6a requires the axial strength to be not less than the greater of overstrength, or as prescribed in D2.5.
Section D2.5 includes all splice requirements. Section D2.5b is "required strength". Subsection (1) includes your typical overstrength or required...
Looking for ideas on a simple way to add a steel ledger to the side of a wide flange beam.
I want to use wide flange because it will support a moment frame with moment connection. This is in a shallow floor system. Residential. On one or both sides depending on location, I will have concrete on...
For seismic stability, foundations need not consider overstrength. But for bending, we need to use overstrength. If I model the foundation with compression springs, I can't check the foundation because the model fails stability. What do you do in this situation?
Typically if I have a moment...
1) What is the definition of deep vs shallow foundation for IBC (CBC specifically)? I couldn't find one. Is it base on type, total depth, or ratio?
2) designing seismic ties for 0.1Sds x factored gravity loads:
a) Must one restrain all piers at once for this load, or check each individually...
For end connections of repetitive simple span members subject to C&C wind load, would you use half the length squared divided by three, or the full length squared divided by 3 to determine wind pressure?
[(L/2)^2]/3
or
(L^2)/3
www.hellodwell.design
I see talk of lag screws in the code and online, and have heard older engineers mention them (I'm 37). I've seen them in stores, so someone must be using them. I've never specified them and only twice had a request from a contractor to use them. However, neither of those 2 times were a...
I'm bidding a horse arena, and the owner wants to use wood trusses. In order to keep the sides open, I'm trying to find any requirements for timber lateral resisting systems (SDC D). There is a system called "timber frames" under "cantilevered columns", but I can find no information anywhere as...
