When a ledger is installed to strengthen a stair assembly, treated lumber must be used if the ledger is _____
a. less than 2? in thickness
b. fastened with lag screws
c. in an area of high humidity
d. fastened to a concrete floor
d
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Is the effective R-value of the following two walls the same or different? Explain.
(a) A 4-in.-thick metal stud wall with studs spaced 24 in. on center and 4-in-thick fiberglass insulation between studs. (b) A 4-in.-thick metal stud wall with studs spaced 12 in. on center and 4-in-thick fiberglass insulation between studs.
Discuss three organic variables that must be considered prior to the application of
an herbicide.
What will be an ideal response?The spacing between the electrode tip and the nozzle tip is called the ____________________.
Fill in the blank(s) with the appropriate word(s).
The acronym DEF stands for ________
A) Double efficiency fuel system B) Diesel engine fan C) Diesel exhaust fluid D) Di-ethylene fuel