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