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Week 3

Week 3. Electrical. Code 1. all electrical outlets run off a pigtail from main line 2. Each Circuit is wired directly into circuit panel - no junction boxes 3. Bathrooms must have GFCI either at panel or first outlet must be GFCI. 4. In rooms must have outlet a) on any wall longer than 2’

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Week 3

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  1. Week 3

  2. Electrical • Code • 1. all electrical outlets run off a pigtail from main line • 2. Each Circuit is wired directly into circuit panel - no junction boxes • 3. Bathrooms must have GFCI either at panel or first outlet must be GFCI

  3. 4. In rooms must have outlet • a) on any wall longer than 2’ • b) no more than 6’ from any door • c) no more than 12 feet apart along wall • d) less than 18” off floor

  4. 5. Kitchen • a) Refridgerator on own circuit • b) at least two circuits for outlets • c) must have outlet on island if more than 6 sq ft • d) outlets within 6 feet of sink must be GFCI • e) all countertops must have a wall outlet

  5. 6. Must have at least 1 outside outlet - GFCI • 7. Don’t forget furnace • 8. Fire detectors must be hard wired into a circuit with lights

  6. 9. Separate circuits for: Clothes Dryer, Electric Range, Electric Ovens, Electric Hot Water Heater, Gas Range, Electric baseboard heaters • 10. Must fill all holes between floors with a fire stop caulk • Know local code - does all wiring have to be in conduits?

  7. Plumbing • 1. All drain pipes must be vented • 2. Sewer pipe must be PVC Schedule 40 or better - can use cast iron pipe • 3. All sewer pipe joints must be welded • 4. Minimum 3” pipe for toilets and main runs

  8. 5. Minimum 1-1/4” pipe for sink drains • 6. 1/2” pipe minimum for water pipes type L copper • 7. 3/4” copper pipe for baseboard heat

  9. 8. Gas is piped through Black Iron pipe and fittings or rolled copper tube • 9. boilers and hot water heaters must have a pressure relief valve and piping to floor • 10. Rough in plumbing includes setting tubs and showers - need to insulate outside walls before they are installed

  10. Large Projects • Estimated differently than other projects • Many involve several separate construction projects • May be large area • Roadway • Super Walmart • Large housing development • Have to look at project to do estimate correctly

  11. May break project into quadrants or sections to facilitate scheduling (allows faster completion) • Need to estimate each section to get correct quantities • Won’t be the same quantities as if doing 1 estimate

  12. Contingencies • What is it? • Risk factor • Allows contractor to factor in the unknown • The less that is known about project – higher the contingency • Design –Build has a high contingency at start of project • decreases as project is built

  13. Why do you want to minimize it? • Part of bid • Drives up final price • Need a good estimate • Contingency never equals zero • Always something that is not known • Price fluctuation • Weather • Labor

  14. Mobilization • How much does a piece of equipment cost • Need to include getting it to/from site • Need a truck to haul each way • Each time equipment is brought on site cost money • Want to minimize – how • What is cost? • Truck, driver, setup, inspection • May need equipment to set up

  15. Unit price bid • We have been talking about a lump sum estimate • Unit Price estimate gives price per unit to do work • Multiply units by price to get cost • Still need a good estimate to find errors • Includes all costs associated with item • Mob/Demob, material cost, labor cost

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