the purpose of roof framing is - Answers to support the roof covering materials
the roof framing member that extends from the ridge to the top plate or beyond is called a - Answers
Rafters
if a roof has a pitch of 3:12 and the rise is 6' the span is? - Answers 24 inches
the roof span is measured from ____ to _____ - Answers extierior stud wall to exterior stud wall
the ____ of a roof is one half the span - Answers Run
the formula for calculating the fractional pitch of a roof is - Answers Pitch=Rise/Span
the pitch of a roof that has a slope of 45 degrees is - Answers 1/2 pitch 12:12
list 3 things that determine rafter size - Answers distance spanned, spacing of the rafters, and weight to
be supported
a lightweight roofing material is one that weighs less than ___ pounds per square foot - Answers 4 lbs
per square foot
the ___ is the overhang of the roof at the races line that forms a connection between the rood and
sidewalls - Answers Cornice
list the three types of cornices that are frequently constructed on homes - Answers open cornice, box
cornice, wide box cornice with lookouts
list the two purposes of attic ventilation - Answers decrease moisture and cool house during the summer
the total area of ventilator openings should be a minimum of __ of the ceiling area - Answers 1/300th
name 2 materials commonly used for roof flashing - Answers aluminum, copper
roof sheathing on most homes is ___ thick plywood - Answers 1/2"
5 roofing materials on residential structures - Answers asphalt shingles, wood shingles, tile, slate, roll
roofing, copper, aluminum, galvanized steel,
the recommended minimum weight of asphalt shingles is ___ pounds per square - Answers 235
2 advantages of a roof truss over conventional framing techniques - Answers wide, unsupported spans,
minimum material
3 trusses commonly used in residential structuers - Answers W-type Truss, K-post Truss, Scissor Truss
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