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<DIV><FONT size=2 face=Arial>From your description I am not clear if the
original RSJ is also within the window opening or extends to the outer walls
either side of it? </FONT></DIV>
<DIV><FONT size=2 face=Arial>If it is, the brickwork securing the existing RSJ
has to be disturbed to remove it to fix the replacement. This then has to be
made good before the surface fixing can take place. Surely the building in of
the new channel is just part of the making good process.</FONT></DIV>
<DIV><FONT size=2 face=Arial>If not, presumably the Engineer and contractors
have sufficient experience to guarantee the spec.</FONT></DIV>
<DIV><FONT size=2 face=Arial>Does the window cill provide support for the new
channel? </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Peter Trent</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=aaspland@rgY8ITtWWQJ6ryCQPurrRb3vjLsBinnPxclI5lwJ1kYvHouKFrAvHvfBMIzrNOfaDpgcofKU8klKQ4lvrmSKfAjZxImGyhg.yahoo.invalid href="mailto:aaspland@w58IOzTjTBfexBVzSYYUPK7TYwel0ksKbHpJDyHeOUYteRphFdS9usCqXENWcIaqyTIrmuCKFFodKAFKdsx3.yahoo.invalid">Andrew
Aspland</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=bellhistorians@yahoogroups.com
href="mailto:bellhistorians@yahoogroups.com">Bellhistorians</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, July 16, 2009 6:33
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Bell Historians] </DIV>
<DIV><BR></DIV><SPAN style="DISPLAY: none"> </SPAN>
<DIV id=ygrp-text>
<P>Dear Historians<BR>Could you indulge me with some very recent history (so
recent it may be in<BR>the future) and allow me to pick your technical
brains?<BR><BR>I have a DAC proposal infront of me which includes removing a
120mm by 120mm<BR>I section steel beam and replacing it with a 152 by 89 RSC
(rolled steel<BR>channel?). This beam currently spans a window opening, being
built into the<BR>brickwork either side, and supports the ends of two steel
bellframe beams.<BR>The replacement would be bolted to the inside faces of the
wall either side<BR>of the window opening and take over the job of supporting
the beam ends.<BR>The "fixings into the wall to be stainless steel with
neoprene isolation<BR>washers. Fixings to be made into brickwork joints where
possible." There<BR>are six bolts proposed at each end of the beam though the
bolts' dimensions<BR>are not given. This is to allow room between the louvres
and the steelwork<BR>for a telecommunications antenna.<BR><BR>I have
reservations about chopping up bellframes to get antennae in and I<BR>would
appreciate the technical people commenting on the suitability of
the<BR>replacement beam. My own feeling is that the strength of the new beam
may<BR>well be equal or even better than the former BUT the fixings concern me
-<BR>bolting onto the surface of the brickwork seems a lot less satisfactory
than<BR>building ends in.<BR><BR>I need to respond to the DAC fairly quickly.
Could members of this list<BR>please comment on the
proposals?<BR><BR>Thanks<BR>Andrew<BR><BR></P></DIV><!--End group email --></BODY></HTML>