M2
Architectural / Sheet Metal
We have contacted many domestic
companies able to produce required
We have found very little difficulty
hard metric stone sizes.
showing dimensions in mm thickness only
in specifications.
Architectural / Studs
While several people indicated it would
We have seen several conversion
be simpler to leave gage, we feel
systems, and propose to call common
specifying mm thickness eliminates all
metal studs by these nominal mm
confusion, and still allows standard
sizes, which closely align with the
products to be supplied, since
dimensions in the standard:
42 64
specifications give minimum thickness.
92 102 153 mm
Our projects are now moving toward
A 22 mm hat channel for furring is
showing minimum thickness in mm only.
also common.
We recommend specifying in even 1 or
Architectural / Woodwork
0.1 mm thickness wherever possible.
(ex, 1 mm, 1.6 mm)
Custom casework, such as cabinets,
built-in benches, shelves, security
Most overseas references we see also
desks, and judges benches, should be
utilize either
developed in hard metric to the
1 or 0.1 mm increments.
fullest degree possible.
From our research, hard metric sheet
Dimensions should follow the rachet
metal is obtainable, even in smaller
technique.
quantities.
Cabinets Many cabinet widths we
Architectural / Slope
have seen are shown as increments of
50 mm. (ex, 450, 500 mm wide)
There is benefit to using % for slope.
Lockers in childcare have been seen
Rule: Percent x 10 = mm/m
(mm per
as 250 mm wide.
meter drop)
Civil / Concrete
Ex: 2 % x 10 = 20 mm/m,
45 % = 450
mm/m
Concrete is now being widely
specified throughout the country in
We recommend using % instead of ratios
MPa. Strengths are stated in 5 MPa
(ex, 1:12), wherever possible.
increments: 20, 25, 30, 35, 40, 45,
50, etc.
Architectural / Stone
20, 25 and 30 MPa are the most
Stone, such as granite and marble,
common.
should be specified in hard metric (ex,
30, 50 mm thick, or 100 x 300)
ACI 318 M, metric version, should
now be used.
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