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WALL FRAMING

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Interior & exterior walls

basic wall components– bottom plate– studs– top plates– headers– bracing– sheathing– finishing materials

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Plates

most common assembly consist of one bottom plate and two top plates for wood framing

refer to wall sections for sizes refer to specifications for grade of

lumber used

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Plate takeoff plates are required for exterior walls and

interior walls NOTE: exterior and interior walls may

be different is size therefor perform takeoff separately

multiply the total linear feet of wall by the number of plates required in the wall sections

length’ of walls * number of plates NOTE: do not deduct for openings

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WOOD STUDS

studs, like plates should be taken off separately based on sizes required

Studs are most commonly 2” X 4” @ 16” O/C or

2” X 6” @ 16” O/C

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WOOD STUD TAKEOFF

review specifications and drawings for spacing and lumber grade

FORMULA

# studs = roundup (length’ of wall / 1.33)

or

# studs = roundup (length’ of wall * 0.75)– 1.33 and 0.75 is for 16” o/c studs

NOTE: do not deduct for openings

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WOOD STUD TAKEOFF

after number of studs are calculated add the following– for every corner or end add 1 stud– for every intersection add 2 studs– for every opening add 2 studs

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WOOD HEADERS

headers are required to support the weight of the building over openings

check the specs. and drawings to determine if headers are built-up wood , engineered or cripples

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WOOD HEADERS

a built-up header is made up of 2 pieces of lumber usually 2” x 4”, 6”, 8”, 10” or 12”

header length must also be considered usually the header must extend over the

top of one stud on either side of the opening ( jack stud )

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Exterior sheathing

most common materials are– plywood sheathing– OSB sheathing– rigid insulation

exterior sheathing is taken off in square feet check wall sections to exact area of wall to be

covered height’ of area covered by sheathing X

length’ of wall– do not subtract for openings

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Air barrier air barrier is used to allow moisture to escape

from the inside but prevent wind from entering common type is TYVEX taken off in square feet but ordered by the roll check wall sections to exact area of wall to be

covered do not subtract for openings

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Insulation

common types used are:– batt insulation– rigid insulation– blown-in

batt insulation is friction fit between the studs

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Insulation

insulation is made in different thickness to meet the building code R-value requirements

different locations in a home require different R-values

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Insulation insulation is taken off in square feet but ordered in

bundles check specifications and interior walls for sound

insulation do not subtract for openings smaller then 50 sf thickness and framing spacing must be taken into

consideration

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Vapour barrier vapour barrier must be placed on the warm

side of the structure usually between interior face of stud and drywall

check wall sections for all locations taken off in square feet but ordered in rolls do not subtract for any openings all joints should be taped or caulked

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REMEMBER

-TEST NEXT WEEK