Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Coped/Blocked Connection

[Subject Prev][Subject Next][Thread Prev][Thread Next]
I think the distinction between cope, block, and cut deals primarily with
semantics.  With most steel detailers, cope and block are used
interchangeably and refer to removal of the flange and part of the web. Cut
(and strip) typically refer to removal of part of the flange only, leaving
part of the flange and the web fully intact. However, some detailers also
use the term cut to refer to a cope or block. The important point is that
the detail drawing should illustrate what needs to be done.

Some illustrations are shown in AISC ASD manual on page 4-175. Here, the
distinction between cope and block is not clear.

However, in AISC LRFD manual Volume 2 on page 8-226, a distinction is made
between cope, block and cut. Cope is shown to be removal of the flange along
with a portion of the web. Block is shown as a reduction in the width of the
flange. Cut is shown as stripping the flange up to the web. Here, the
illustration of "block" seems to be inconsistent with the term "block
shear", which refers to shear in the web of the beam.

I realize that this is not a very definitive answer, but it illustrates the
need to show the desired cope, block, cut, or strip on the detail drawing.

-----Original Message-----
From: CanitzCF <CanitzCF(--nospam--at)>
To: seaoc(--nospam--at) <seaoc(--nospam--at)>
Date: Sunday, April 19, 1998 4:31 AM
Subject: STL: Coped/Blocked Connection

>This is another one of those nagging questions that bug me since I can't
>to find a  definitive answer. While detailing steel beam connections in the
>past, I invariably stated that the top or bottom(or both) of the supported
>member shall be "coped". While recently reviewing the AISC's "Engineering
>Steel Connections", I noticed that the connections detailed throughout were
>indicated as either "coped", "blocked" or "cut". Is there a difference
>these fabrication procedures or is it a matter of semantics?
>Charlie Canitz, PE
>Bel Air, MD