>Subject: FW: Modification to S261-99
>
>-----Original Message-----
>From: Joseph J. Messersmith, Jr. [mailto:jjsmith@mnsinc.com]
>Sent: Monday, March 15, 1999
>To: JGreenwald@NCMA.org
>Subject: Modification to S261-99
>
>
>Jeff:
>
>The attached file has modifications I plan on proposing to MACS's S261-99
>in Costa Mesa. Do you think MACS will have any problems with this? By the
>way, there are many problems with this proposal. Does MACS plan on
>submitting modifications to clean it up?
>
>Jim Messersmith
CODE CHANGE. S261-99
PROPONENT OF MODIFICATION. Joseph J. Messersmith, Jr., Portland Cement
Association
Revise Section 2111.1 to read:
2111.1 General. A masonry chimney is a chimney constructed of concrete or
masonry, hereinafter referred to as masonry. Masonry chimneys shall be
constructed, anchored, supported and ¼ (remainder unchanged).
Revise Sections 2111.5; 2111.15, Exception #1; 2113.5; 2113.8; and 2113.12,
Exception #1 by deleting the word "reinforced."
Revise 2111.7 to read:
2111.7 Wall thickness. Masonry chimney walls shall be constructed of
concrete, solid masonry units, or hollow masonry units grouted solid with
not less than 4 inches nominal thickness.
Revise Section 2113.1 to read:
2113.1 General. A masonry fireplace is a fireplace constructed of concrete
or masonry, hereinafter referred to as masonry. Masonry fireplaces shall
be constructed in accordance with this section and ¼ (remainder unchanged).
Revise 2113.3.1 to read:
2113.3.1 Vertical reinforcing. For chimneys up to 40 inches wide, four No.
4 continuous vertical bars shall be placed in the concrete, or between
wythes of solid masonry, or within the cells of hollow unit masonry, and
grouted in accordance with ¼ (remainder unchanged).
Revise 2113.3.2 to read:
2113.3.2 Horizontal reinforcing. Vertical reinforcement shall be placed
enclosed within 1/4-inch ties, or other reinforcing of equivalent net
cross-sectional area, spaced not to exceed 18-inches on center in concrete,
or placed in the bed joints of unit masonry according to ¼ (remainder
unchanged).
Revise 2117.1 to read:
2117.1 General. A masonry heater is a heating appliance constructed of
concrete or solid masonry, hereinafter referred to as masonry, having a
mass of at least 1760 pounds (800 kg (1760 lbs.), excluding the chimney and
foundation ¼ (remainder unchanged).
REASON. Existing 2111 addresses concrete and masonry chimneys and
fireplaces. The proposal in some places mentions concrete and in others it
is omitted. This could result in confusion as to whether some provisions
address concrete. The changes being suggested above will clarify that the
requirements apply equally to both materials.
In five sections the word "reinforced" is being proposed for deletion where
it precedes the word "concrete." The provisions do not mandate reinforced
masonry, and concrete should be treated no differently. Section 2113.3
will still require reinforcement in concrete, as well as masonry chimneys
in buildings at higher seismic risk.
From: Jim Buckley [mailto:buckley@rumford.com]
Sent: Monday, March 16, 1999
To: JGreenwald@NCMA.org
Subject: Modification to S261-99
Jeff,
Thanks. I will contact Jim Messersmith. I don't see any reason not to agree with him. He's just trying to be consistent in the use of the words "concrete" and "reinforced concrete" and we just were focused on other things and were not as sensitive to it as he is. As far as I can see its only editorial and we should support the Portland Cement Association.
Jim Buckley
PS: We agree with Jim and have incorporated all his suggestions in both the IBC and IRC "Joint" revisions.
