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Re: Fireproofing

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Most of the monokote I have seen has the consistency of wet fiber with
vermiculite or perlite additives, not solid concrete.  25 psf is a world
apart from 15 pcf.  According to Grace, with MK-60, a W24x55 requires 1/2"
at 15 pcf for a one hour rating, 7/8" for a 2 hour rating, assuming a rated
deck assembly.  This equates to 3.5 to 7 lbs per linear foot.  I may have
been a little light at two or three pounds of the cuff, but I am way off
from 138.


Paul Feather PE, SE
pfeather(--nospam--at)SE-Solutions.net
www.SE-Solutions.net
----- Original Message ----- 
From: <Rick.Drake(--nospam--at)Fluor.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, August 27, 2003 9:45 AM
Subject: Re: Fireproofing


>
> A W24x55 beam has about 5.53 square feet of surface area per foot of
length
> (AISC Case A).  It takes 2 inches of concrete (25 psf) to get the fire
> rating.  That works out to be about 138 pounds of concrete per foot of
> W24x55 beam length.
>
> Rick Drake, SE
>
> *********
>
>
>
>
>                       "Paul Feather"
>                       <pfeather@SE-Soluti      To: <seaint(--nospam--at)seaint.org>
>                       ons.net>
>                       08/27/03 07:38 AM        cc:
>                       Please respond to
>                       seaint                   Subject:  Re: Fireproofing
>

>
.....
>
>
>
>
>
> practically zero.  If the spray on fire protection is more than two or
> three pounds per linear foot on a 24" beam I would be surprised.
Typically
> spray on is accounted for in the miscellaneous loading.  If the spray on
is
> a factor in the beam design, you are cutting things way too close. :-)
>
>
> Paul Feather PE, SE
> pfeather(--nospam--at)SE-Solutions.net
> www.SE-Solutions.net
>  ----- Original Message -----
>  From: Stuart, Matthew
>  To: 'seaint(--nospam--at)seaint.org'
>  Sent: Wednesday, August 27, 2003 5:57 AM
>  Subject: Fireproofing
>
>  Anybody got a good rule of thumb uniform dead load for sprayed on
>  fireproofing of steel beams?
>
>  D. Matthew Stuart, P.E., S.E., P.Eng.
>  Senior Project Manager
>  Schoor DePalma Engineers and Consultants
>  Manalapan Structural Department
>  200 State Highway Nine
>  Manalapan, NJ 07726
>  732-577-9000 (Ext. 1275)
>  908-309-8657 (Cell)
>  732 -431-9428 (Fax)
>  mstuart(--nospam--at)schoordepalma.com
>
>
>
>
>
>
>
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