Engrman
Structural
- Apr 2, 2002
- 54
I have a 210,000 sf (300x700), pre-engineered metal bldg light industrial project. The soils report recommends PT slabs on ground because of potential for large differential movements. Site has near surface expansive claystone bedrocks and topography dictates some areas will require up to 28 ft of fill. Upheaval due to expansion in one corner and settlement due to fill consolidation in the other. Foundation system will be drilled piers. Several questions:
1. PTI's "Design of PT Slabs-on-ground" seems geared toward residential applications. Is it applicable for the more heavily loaded industrial or commercial projects or is there a different design manual for those?
2. My opinion is a uniform thickness slab is better suited to industrial projects rather than ribbed since load locations will vary over the service life. Am I correct?
3. What would be a reasonable max slab panel or strip size for a uniform thickness floor?
4. For ribbed slabs PTI says limit max spacing to 15'-0". That's alot of ribs for a project this size. Can they be spaced further?
5. How best to incorporate SOG with perimeter grade beams? Several of the exterior walls will have masonry veneer.
1. PTI's "Design of PT Slabs-on-ground" seems geared toward residential applications. Is it applicable for the more heavily loaded industrial or commercial projects or is there a different design manual for those?
2. My opinion is a uniform thickness slab is better suited to industrial projects rather than ribbed since load locations will vary over the service life. Am I correct?
3. What would be a reasonable max slab panel or strip size for a uniform thickness floor?
4. For ribbed slabs PTI says limit max spacing to 15'-0". That's alot of ribs for a project this size. Can they be spaced further?
5. How best to incorporate SOG with perimeter grade beams? Several of the exterior walls will have masonry veneer.
