Upload
brittney-may
View
222
Download
0
Embed Size (px)
Citation preview
1
WALL FRAMING
2
Interior & exterior walls
basic wall components– bottom plate– studs– top plates– headers– bracing– sheathing– finishing materials
3
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
4
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
5
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
6
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
7
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
8
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
9
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 )
10
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
11
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
12
Insulation
common types used are:– batt insulation– rigid insulation– blown-in
batt insulation is friction fit between the studs
13
Insulation
insulation is made in different thickness to meet the building code R-value requirements
different locations in a home require different R-values
14
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
15
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
16
REMEMBER
-TEST NEXT WEEK