FINAL REVIEW - cavating. The small15-20FTis used forMethod...

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e xcavating. The small bucket is used for pipe digging while the big one is for the trench box shown here. Auger 36” Cast Trench Box Figure 5: Open-Cut vs. Tunneling Method 15-20FT Con E 280 Final Review Describe the different construction methods: Explain the suitability of wood construction @ UCSD: They did an analysis and found out that wood is the more expensive route for this project and also slower. This causes it to be less flexible as well. Steel is fabricated off-site and brought in to specs ready for assembly. Steel also improved the fire rating of the dorms. Example of Building process: 1) Grading and site preparation 2) Foundation construction 3) Framing 4) Installation of windows and doors 5) Roofing 6) Siding 7) Rough electrical 8) Rough plumbing 9) Rough HVAC 10) Insulation 11) Drywall 12) Underlayment 13) Trim 14) Painting 15) Finish electrical 16) Bathroom and kitchen counters and cabinets 17) Finish plumbing 18) Carpet and flooring 19) Finish HVAC 20) Hookup to water main, or well drilling 21) Hookup to sewer or installation of a septic system 22) Punch list How do you build a foundation? Survey and Stake -- Before any construction can begin, the home site is surveyed to establish the home's basic footprint and to ensure the home is set back the appropriate distances from the property lines. The corners of the home are marked by surveyor's stakes. Offset stakes, which are about two feet out from the surveyor's stakes, also
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are placed. The excavator will dig at the offset stakes, creating a slightly larger hole than the foundation actually will occupy. The extra room enables crews to work on the exterior of the foundation walls. Excavation -- The depth of the excavation is determined by a structural engineer who considers the soil, the frost line and the height of the water table (the depth in the soil at which you find water). Surface soil is removed to expose soil that is compacted enough to bear the load of the home. The excavation must be deep enough to place the top of the footing below the frost line. This prevents the concrete from cracking due to the freeze-thaw cycle of the surrounding soil. The excavation cannot be so deep that it's below the water table, however, because that can cause a chronically wet or flooded basement. Footings -- Footings are poured concrete pathways that help to spread the weight of the home from the foundation walls to the surrounding soil. Footings are wider than the foundation walls they support, and form the perimeter of the home. Sometimes, additional footings are added inside the perimeter to support load-bearing interior walls. Sub-slab Systems -- Plumbing lines are run from the street to the home's basement, by going under or over the footing. In some regions, soil gas mitigation systems are added to collect the soil gases trapped under the slab and vent them to the outside. Eventually, these systems will be covered with the poured concrete slab that is the basement floor. Foundation Drainage Tile System
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This note was uploaded on 06/27/2010 for the course CON E 280 taught by Professor during the Spring '10 term at SD State.

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FINAL REVIEW - cavating. The small15-20FTis used forMethod...

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