Building Code
What is the minimum height of a guardrail with a 36" drop-off?
42"
What is the primary benefit of foil-backed OSB or metal roofing?
radiant barrier
Why is an S-trap illegal?
Where are GFCIs required?
Anywhere where water is present. Bathrooms, kitchens, garages, exterior, laundry rooms, etc.
What is Angela's favorite day of the week?
Invoicing day
What type of paper is required for stucco cladding?
two layers of Type D building paper
What does R-value represent. What is typical R-value on 2x4 and 2x6 walls?
insulating value.
2x4 - R-13
2x6 - R-19
What does a gas sediment trap do and where should it be installed?
Collects small sediment in gas before entering an appliance, should be installed as a vertical T right before appliance.
Where are AFCIs required?
bedrooms, living rooms, dining rooms, sunrooms, and other gathering places?
What is the profit margin in percentage terms on a job that had $50,000 in revenue, and $40,000 in costs?
$50,000
($40,000)
$10,000 gross profit
$10,000/$50,000 = .20
20%
what is the minimum allowable slope for asphalt roof shingles?
2:12
What is a thermal break?
a barrier or "break" where thermal transfer between varying climates is insulated
Electrolysis will happen when ___
copper pipe is in contact with any ferrous material
How are watts calculated?
Volts x Amps
What does AP mean?
Accounts Payable - what the business owes
What is the required stucco lath nailing pattern?
Every 6" vertically on 16"OC studs
What is a rain screen and what is the benefit?
Separation layer between cladding and WRB, allows cladding and exterior system to naturally dry
How do you conduct a rough-in drain test?
plug all fixture trap arms, test ball the main line, fill with water to highest point with 10' of head pressure from highest fixture. No leaks for 24 hours
Or, 5 psi of air with no change in pressure for 24 hours
What do Amps measure?
electric current
What does AR mean?
Accounts Receivable - what the customer owes us
What is the maximum variance in stair riser height between highest and lowest risers?
3/8" over stair run
What causes icicles to form on roof lines?
inadequate attic ventilation, attic gets too hot, heat can't escape, melts snowpack, which re-freezes on the eaves where it is still colder
What is the process for soldering pipe?
Measure
Cut
Ream
Clean
Flux
Fit
Support
Heat
Solder
Cool
Clean
What do Ohms measure?
electrical resistance
What does net 30 2/10 terms mean?
payment due in 30 days
2% discount available if paid within 10 days