Civil / Concrete
Civil / Geotech
Concrete is now being widely specified throughout the
Geotech reports shall be SI units only, and equally
country in MPa. Strengths are stated in 5 MPa
importantly, shall be in rounded SI units. Bearing and
increments: 20, 25, 30, 35, 40, 45, 50, etc.
side frictions values shall be in MPa, rounded to 1 or 0.1
MPa increments wherever possible.
20, 25 and 30 MPa are the most common.
Failure to state bearing values in even MPa will cause
ACI 318 M, metric version, should now be used.
english values to be utilized throughout the project.
Example: Conversion of an english value to 1.437 MPa
Slump Limits on metric projects always use
will not cause people to use this number, whereas
10 or 5 mm increments. (ex, 75, 80, 90 mm)
rounding to 1.4 or 1.5 MPa, if technically possible,
Some Canadian documents state increments of
produces a number easy enough to incorporate into
10 mm are to be used. (ex, 80, 90, 100 mm)
common daily use.
Show anticipated settlements in even mm sizes.
Civil / Concrete Pipe
Location plans and boring plates shall be to metric
scales, and shall have metric graphic scales only.
ACPA states concrete pipe can now be specified using
hard metric ASTM and AASHTO standards, as is
Soil profiles and boring logs shall show even meter
currently done in Canada.
depth increments only. Bearing value contours shall be
in meters. Describe boring equipment, such as barrels
Reinforced concrete pipe is now being specified on our
projects as ASTM C76M / AASHTO M170M.
Current C76 RCP will meet the hard metric standard, as
tolerances were set in the hard metric standard to accept
Nonreinforced concrete pipe will be specified as ASTM
C14M / AASHTO M86M.
C76M sizes: 300 375 450 525 600 675 750 825
900 1050 1200 1350 1500 1650
1800 1950 2100 2250 2400 mm
C14M sizes: 100 150 200 250 300 375 450 525
600 675 750 825 900