M2
Slump Limits on metric projects always
use this number, whereas rounding to
use 10 or 5 mm increments. (ex, 75, 80,
1.4 or 1.5 MPa, if technically
90 mm)
possible, produces a number easy
enough to incorporate into common
Some Canadian documents state
daily use.
increments of 10 mm are to be used.
(ex, 80, 90, 100 mm)
Show anticipated settlements in even
mm sizes. Location plans and boring
Civil / Concrete Pipe
plates shall be to metric scales,
and shall have metric graphic scales
ACPA states concrete pipe can now be
only.
specified using hard metric ASTM and
AASHTO standards, as is currently done
Soil profiles and boring logs shall
in Canada.
show even meter depth increments
only. Bearing value contours shall
Reinforced concrete pipe is now being
be in meters. Describe boring
specified on our projects as ASTM C76M
equipment, such as barrels and
/ AASHTO M170M.
hammers, in SI units only.
Current C76 RCP will meet the hard
Civil / GIS
metric standard, as tolerances were set
in the hard metric standard to accept
Many Geographic Information Systems
current product.
and AM/FM systems for mapping, gas,
electric, and water distribution
Nonreinforced concrete pipe will be
mgmt, wastewater systems, and other
specified as ASTM C14M / AASHTO M86M.
infrastructure elements, will
operate in SI.
C76M sizes:300 375 450 525 600 675 750
825 900 1050 1200 1350 1500 1650 1800
Delta Data MS, offers AGIS, Adv
1950 2100 2250 2400 mm
Geographic Informatn System, which
runs in SI. (601) 799-1813
C14M sizes: 100 150 200 250 300 375 450
525 600 675 750 825 900
ESRI CA, produces ARC/INFO, a market
leader in the GIS market as well as
Civil / Geotech
the utility market, which will work
completely in metric. (909) 793-
Geotech reports shall be SI units only,
2853 x 1375
and equally importantly, shall be in
rounded SI units. Bearing and side
Facility Mapping Systems CA,
frictions values shall be in MPa,
produces several software packages
rounded to 1 or 0.1 MPa increments
that operate in metric:
wherever possible.
FMS/AC Municipal
(DPW and Planning)
Failure to state bearing values in even
FMS/AC Public Works
MPa will cause english values to be
(infrastructure mgmt)
utilized throughout the project.
FMS/AC Utility
Example: Conversion of an english value
(electric, gas, water systems)
to 1.437 MPa will not cause people to
Gregg Smith
21
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