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Re: Beveled Washers for MC Channels

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My apologies for the quick & incomplete post....I neglected to add that washers material meets ASTM specs & that hardened steel washers are also available

Specs on washers from McMaster

Malleable iron meets ASTM A47, Class 32510. Rockwell hardness is B62.

Hardened steel is made of C1035-C1055 steel. Rockwell hardness is C38. Washers conform to ASTM F436 and are for use with A325/A490 structural bolts.

If you need them in a hurry its hard to beat McMaster.


cheers
Bob



On 5/17/07, Scott, William N <William.N.Scott(--nospam--at)conocophillips.com> wrote:
Beveled washers need to meet the ASTM F???? for hardened washers. An iron washer from McMaster-Carr is probably cast iron of unknown quality.
 
Check Chicago Bolt or Portland Bolt for ASTM conforming beveled washers.
 
Bill


From: Robert Kazanjy [mailto:rkazanjy(--nospam--at)gmail.com]
Sent: Wednesday, May 16, 2007 5:59 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Beveled Washers for MC Channels

David-

Check out www.mcmaster.com

page 3156

the washers are for standard I-beams  16% slope (1:6)

they're available in iron for about 40 to 50 cents (small to medium sized bolts) up to about $1 each in large sizes.

If these don't fit the bill  .........a machine / heavy sheet metal shop could shear, punch & shear then up out of channel flange for you....

punching & shearing would be the cheapest means of making them custom but they'd be pretty coarse, not pretty

cheers
Bob

On 5/16/07, Gary L. Hodgson and Assoc. <ghodgson(--nospam--at)bellnet.ca> wrote:
David,
As far as I know, bevelled washers are available but expensive and hard
to find.  i always recommend to fabricators to cut up some flanges from
left over channels and use them to make washers=easy and relatively
cheap. Another alternative is, if you have a good burning machine, is to
cut flat bar in half on a taper to get your bevelled material and then
drill. Sometimes it takes a bit of additional grinding.  Shops do this
all the time to make wedges for fitting steel.
Gary

davidfinley(--nospam--at)bizsea.rr.com wrote:
> A retrofit requires adding top & bottom plates to "box in" 2 existing MC channels.  I know the flange slope of MC channels is different than "standard" C channels.  Are beveled washers for MC channels readily available?  Are the same washers used for both types of channels?
>
> David Finley
>
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