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KootK, I like detail 1 better than my idea (detail 2) actually. Thank you!

11 7/8" joists work for the continuous span. Thanks for the insight.

I've got an interior load-bearing wall that will have TJI joists bearing on it from both sides. One side has 9 1/2" deep joists, the other has 16" deep joists, and the tops must be at the same elevation. How should this be detailed? Would the 9 1/2" joists have blocking beneath them to get their...

I have an RFI from a contractor saying he can't get a 16' C10x30 beam into place without cutting it in half and splicing it together. For various reasons, I don't believe welding is an option where this beam is, and the contractor wants to splice the beams with bolts and a single plate. A good...

Do they twist and warp even at service loads?

Thanks to both of you.

What's your typical decision process like for deciding whether to use No. 2, No. 1, Select Structural, etc. when specifying Southern Pine? Obviously less cost is preferable, but higher quality wood will need smaller members. Is it different for every job?

Yes, the system is several miles long. We are recommending replacing the whole system, but the owner wants the option to replace only the deficient areas.

So I'm not a mechanical engineer, but I've tasked to come up with a sketch for the repair of a transite HVAC system. The transite is very old and has deteriorated significantly. We are suggesting to cut out sections of damaged duct and basically replace the sections with sheet metal couplings...

That's very helpful, thanks.

So I've been told 2 different things regarding this topic from my 2 different bosses (both are structural PEs). This is in reference to the requirement of ties per ACI 318-05, section 7.10.5. Boss 1 says that for pedestal reinforcement, as long your longitudinal (vertical) bars are 6" or...

That's right. Thank you!

I've run into this problem before. I'm trying to model a W6x20 in plate. I modeled the flange using one large plate. I then tried to submesh it using the quad submesh tool. I want 1/2" square elements, so I told it to submesh using 12 elements along the 6" wide flange (okay, I actually did it as...