TOLERANCES FOR CONCRETE STRUCTURES OTHER THAN
BUILDINGS
Formed surface slope with respect to the specified plane.
Slopes in lateral and level alignments
Visible surfaces.......................... 6 mm in
3000 mm.
Concealed surfaces....................... 12 mm in
3000 mm.
Slopes in vertical alignment
Visible surfaces......................... 12 mm in
3000 mm.
Concealed surfaces....................... 24 mm in
3000 mm.
TOLERANCE FOR FINISHED OR FORMED CONVENTIONAL CONCRETE SURFACES
(1)
Vertical alignment
Formed surfaces slope with respect to the specified plane.
Vertical alignment of outside corner
of exposed corner columns and control
joint grooves in concrete exposed
to view........................................ 9 mm in 3000 mm.
All other conditions.......................... 12 mm in 3000 mm.
[(2)
Abrupt variation in spillway surface
The offset between concrete surfaces
under adjacent pieces of formwork ........................... 3 mm.]
(3)
Gradual variation
Surface finish tolerances as measured
by placing a freestanding (unleveled),
1500-mm straightedge for plane surface or
curved template for curved surface
anywhere on the surface and allowing it
to rest upon two high spots within 72 hr
after concrete placement. The gap at any
point between the straightedge or
template and the surface shall not exceed ................... 6 mm.
(4)
Offsets of adjacent precast gallery
segments shall not exceed .................................. 25 mm.
TOLERANCES FOR CAST-IN-PLACE, VERTICALLY SLIPFORMED
BUILDING ELEMENTS
(1)
Vertical alignment
Translation and rotation from a fixed point at the base of
the structure:
For heights 100 ft or less .................................. 2 in.
For heights greater than 100 ft,
1/600 times the height
but not more than ........................................... 8 in.
(2)
Lateral alignment
SECTION 03701
Page 17
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