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Hey folks, I've been having a bit of a hard time designing a full-capacity moment beam splice between two wide flange beams of the same size. I'd like to design a splice that accounts for the maximum moment that the beam can sustain to avoid having to track loads of the existing structure...

Hello all, I was talking to a friend of mine and we were discussing possibilities about multi-story wood buildings and shearwall concepts. In summary, I was wondering if anyone has ever designed a shearwall with sheathing that travels further than the location of its chords ie. holdown...

Hello folks, I've been dealing with a challenge that I could definitely use some help on. My client is looking to build a home on a relatively steep slope, going downhill from the face of the structure. The garage, which is at the face, is at the highest point at grade, and the grade continues...

Hello folks, Does anyone have any suggestions with extending an existing mat slab? The mat slab is 15" deep with #5 @ 16" O.C. E.W. T&B, and I'm wondering if my initial impression of doweling #5X18" @ 16" O.C. T&B and continuing the reinforcing would be acceptable? There are no significant...

Hello folks, Does anyone have any suggestions/experience with strengthening an as-built existing mat slab? I have a larger point load coming down on the edge of a 15" mat slab (#5 @ 16" O.C. E.W. T&B) and it seems to need some strengthening. Thank you, R

Hello folks, I modeled an ordinary steel moment frame with pinned bases and now I'm coming to you all with a question that has been gnawing at me for some time. Should I design the moment frame base plate as the more conservative 'fixed' condition or can I stick with the 'pinned' base...

Hello folks, I've been working on some calcs and I was hoping to get your take on the following issue: I have an existing 2X12 douglas-fir wood joists supporting the roof. My clients want to convert the use of the roof, and want to strengthen the joists to accommodate the larger live and dead...

Hello all, I was asked sometime ago to design a new retaining wall on one side of a garage, and the other side would keep the existing concrete wall. During demolition, the contractor discovered that the existing 12" concrete wall that was intended to remain actually had 6" of unreinforced...

Hello all, Here's the story: The plumber thought it would be a good idea to notch a 5"X5" square directly at the bottom of a 1.75"X14" LVL 2.0E joist, about 1/3 of the distance in on a 20' +/- total span. The contractor on site has asked me to run a calculation evaluating a 3.5X9.25 PSL 2.0E...

Hello all, Forgive me for not doing enough research before exploring solutions from all of you, but I could use some help and I thought my question may be something up someone's wheelhouse. I need a lightweight concrete slab mixture and reinforcement for a garage supporting vehicle loading. The...

Hello all, I was wondering if someone can give me some advice I've been wondering about for some time. I work in low-rise and mid-rise residential in a high seismic area and I'm sitting here staring at my design for a 18"X18"X12" (12" deep) shallow footing to support a very light deck. My...

Hello folks, My apologies for the relatively banal question, but I'm drawing a blank. It's been a while since I've designed an elevated concrete slab and I was wondering if anyone could give me any design tips on that re-entrant corner? I'm planning on designing this to ACI 318-11 standards...

Hello all, I was hoping someone could give me some pointers - I'm concerned about the flexible diaphragm shear on the lower level of a three story home. Specifically, I have a proposed 26'-0" span between shear lines and I want to know if these existing conditions comply Please see attached...

Hello folks, I am in the process of designing a concrete deck above an operable garage. The client decided to go with concrete after the original wood framing supporting the deck was deteriorated by dryrot. The current garage is retaining soil from both neighboring sides and from the rear -...

Hello folks, I was wondering if someone could give me some quick advice. I'm designing a partial seismic retrofit for a small two-story home - and I'd like to further fasten the existing 4X mudsill to the existing concrete foundation/stem wall. I'm assuming the following: Cracked concrete 1,500...