Yes. The addition is only lateral. No new vertical loads are being added to the old building. I think I would prefer to make the addition stand alone as I am sure the client does not want to modify the existing building. Nor do I really...sounds like a much larger "can of worms". I think...
A client would like to add a two story addition to an existing two story wood framed home that was built in 1922. The addition will add approximately 25% to the length of the building in the longer direction. Is there a "best practices" approach for the lateral analysis of the new portion...
For flexible horizontal diaphrams (wood framing in single family residences) I have always assumed that the lateral shears transfer to the vertical shear resisting panels in proprotion to their relative stiffnes (as a function of their construction-widtn etc). Is there a "common practice" in the...
Without a soils report we are definately going to use a rebar grid. One interesting issue. Our local prescriptive method requires using an assumed EI and pre saturation based on that EI. But this needs to be observed by a soils engineer. However, some soils engineers won't observe without an...
Without a soils report we are definately going to use a rebar grid. One interesting issue. Our local prescriptive method requires using an assumed PI and pre saturation based on that PI. But this needs to be observed by a soils engineer. However, they won't observe without an investigation...
Very nice. Thank you very much. The design will be based on an EI developed by a geotech firm. Here in the Cnetral Coast of CA. local professionals use a prescriptive design method (bolied down from the UBC and experience) for slabs on grade that is less rigerous analytically than UBC 1815...
Interesting. I have not seen this approach for residential slabs, but I will consider it. We typically use a visqueen barrier on all slab jobs. The type V mix is a good idea. Thanks for the comments!
I have never done post tentioned design before. I am working with a design approach for slabs on expansive soils ubc 1815. The ubc section is directly based on a report published by the wire reinforcing institute. "design of slab on ground foundations" W. L. Snowden. It can be found at...
I have the document that you referenced by the wire reinforcing institute. How do you calculate the cracked moment of inertia Icr? Also for the effective width of slab do you use the ACI 8.10 guidelines for a T beam?
I am designing a slab on ground for a single story dimensional lumber framed residential addition. A 10x40 slab will be attached to the existing slab system with rebar dowels. The below grade geometry of the existing slab is unknown as is the reinforcing. There is no soils report for the...
For a two story wood framed home I am designing a spread footing per the soils report. The maximum P(dead)+P(live)=1500 plf. The maximum point loads at the corners of the shear walls due to lateral loads is a 1300lb couple and occur at various loations along the foundation. How do these point...
After completing the timber design of a new single family residence, I was preparing to design the foundation system. I was originally expecting a standard 97 UBC approach spread footing system. During my research I found out that the site is in an area of "moderate liquefaction" potential. I...
Broaden your skills so you can get involved at a higher level of projects than the purely technical. Think skill diversification. Develop basic business skills-especially communication. If you can effectively comunicate technical topics to non-technical managers with charisma you will get...
