TABLE 1
TOLERANCES FOR FORMED SURFACES
7.
Footings:
a.
Variation of
Minus ------------------- 13 mm
dimensions in
Plus -------------------- 50 mm
plan
when formed or plus 75 mm when
placed against unformed excavation
b.
Misplacement of
2 percent of the footing width
eccentricity
in the direction of misplacement
but not more than --------- 50 mm
c.
Reduction in
Minus ----------------- 5 percent
thickness
of specified thickness
8.
Variation in steps:
Riser ---------------------- 3 mm
a.
In a flight of
Tread ---------------------- 6 mm
stairs
b.
In consecutive
Riser ---------------------- 2 mm
steps
Tread ---------------------- 3 mm
TABLE 1
TOLERANCES FOR FORMED SURFACES
1.
Variations from the
In any 10 feet of
plumb:
length ----------------- 1/4 inch
a.
In the lines and
Maximum for entire
surfaces of columns,
length ------------------- 1 inch
piers, walls and
in arises
b.
For exposed corner
In any 20 feet of
columns,control-joint
length ----------- ---- 1/4 inch
grooves, and other
Maximum for entire
conspicuous lines
length------------------ 1/2 inch
2.
Variation from the
In any 10 feet of
level or from the
length ------------------1/4 inch
grades indicated
In any bay or in any 20
on the drawings:
feet of length---------- 3/8 inch
a.
In slab soffits,
Maximum for entire
ceilings, beam soffits,
length ----------------- 3/4 inch
and in arises, measured
before removal of
supporting shores
b.
In exposed lintels,
In any bay or in any 20 feet of
sills, parapets,
length ----------- ----- 1/4 inch
SECTION 03100A
Page 9
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