On 2009/02/06, at 1:35 AM, Howard Ressel wrote:
If and when we go metric in steel design i am sure the industry will
work through some of these problems.
--
"Go for a Metric America"
Howard Ressel
Project Design Engineer, Region 4
(585) 272-3372
Dear Howard,
Add to previous message.
The closest organisation to you with experience of metric steel design
is probably the Canadian Institute of Steel Construction (CISC). Their
web address is www.cisc-icca.ca
Cheers,
Pat Naughtin
Geelong, Australia
On 2/4/2009 at 3:50 PM, in message
<[email protected]>,
Pierre Abbat <[email protected]> wrote:
On Wednesday 04 February 2009 14:54:24 Howard Ressel wrote:
This was a bit back but i received a response from a structural
engineer
friend of mine and he tends to agree.
--
"Go for a Metric America"
Howard Ressel
Project Design Engineer, Region 4
(585) 272-3372
I would agree that designing steel in metric is not as user
friendly.
The steel section properties are typically mm2, mm3 or mm4 and are
very
large numbers. For example the area of a W36x230 beam shape is 68
in2
or 43600 mm2. Similarly, the bending section modulus is 837 in3 or
13700000 mm3. The larger values are not that easy to work with.
For the bending section modulus, we can say it's 13.7 liters, even
though
it's
not a volume. The second moment of area is on the order of millions
of
quartic millimeters, and since there's a 10^12 ratio between the
quartic
millimeter and the quartic meter and powers of 10 that aren't powers
of 1000
are avoided, the numbers are unwieldy. I think the solution is to
give a
name
to the quartic meter, even though I know of no other use for it, so
that the
prefix "micro" can be attached to it.
Pierre
<Howard Ressel.vcf>
Cheers,
Pat Naughtin
PO Box 305 Belmont 3216,
Geelong, Australia
Phone: 61 3 5241 2008
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