Building Consistency Meeting
Residential
Date: 4/2/2008 Recorder and minutes prepared by: Danny Wooten/Jeff Griffin
Staff present: Danny Wooten, George Rogers, Steve Kellen, David Williams, Ron
Dishman, Harold Sinclair, Walt Nash, Michaels Johnson, Ken Turill, Tony Kiser, Eric
Brown, Jeff Vernon, Jacob Gregory, Paul Cupp, Andrew DeMaury.
Public present: Chris Newton/Hans Kasak/Harold Ingram (Ryland Homes), Daniel
McBride (Cunnane Group), Michael Skinner (M/I Homes), Kent Bublitz (Royce
Builders); Justin Kies/Jeff Dotson (Eastwood Homes); Lou Salvador (DR Horton);
Chad Hughes (Barefoot and Co); Jim Brodnik (Mattamy Homes); Rod Spence/Ken
Smith (Banister Homes); Roger Johnston/Will Reeves/Jason Leep (Wynsor Homes);
Jason Whitener (Dienst Custom Homes); Johnny Webster (Calloway Homes); Brad
Crysler/Paul Boucher (John Wieland); Wayne Carter (Evergreen Homebuilders);
Terry Cleary (Meeting Street Homes); Tony Hobart (Hobart Smith Homes); Bob
Mckee (Ryan Homes); Scott Dellinger (Drafting & Design); Gene Harris/Tommy
Crowell (Saussy Burbank); Jason Horten (Parksite); Dave Reynolds (Bldrs 1st
Source); Tony Whitehead/Adam Danneman (McCar Homes); Jason Whitener/Ted
Thompson (Dienst Custom Homes); Chad Ritter (PE); Chris Branham (KB Homes);
Randall Feinster (Structura Construction).
Topics/Subject
Decisions/Conclusions/Actions
Old
Business
None
New
Business
New Appendix
M-Deck Code
Townhouse
anchorage
Handout of work that has been done related to a new appendix M was
passed out, this was a draft version and final version will be distributed
at the next meeting. Final version has been sent to the North Carolina
Building Code Council on April 17th for their consideration at the June
BCC meeting.
There is a significant code change for townhouse anchors on both the
exterior walls and on interior bearing walls requiring a larger bolt
washer per R602.11.1, which states a ¼” 3x3 plate washer is required
everywhere a bolt is installed on townhouses. One product that has been
present to staff and is approved for this application is the Simpson BPS
slotted washer. The slotted washer gives the ability to align the washer
in a 2x4 wall cavity when bolt is not centered on mudsill plate. When
using the slotted washer a standard fender washer is also required. The
other issue has to do with the additional bolting requirement on all
interior bearing walls in a townhouse. The titen bolt made by Simpson
was present as an option for this interior application which can be
installed after the fact (can also be used on exterior walls into solid
CMU or slabs per mfg details). This product can be installed on interior
walls after the structure is built it uses no epoxy and can be drilled and
installed with equavilent holding power as the standard code J bolt
(same spacing 12” off corner and 6’ on center-see attached
information). The Titan bolt can also be used on single family dwellings
where a bolt was forgotten with the BPS washer. Other products are
available but this has been submitted to the Department and has been
approved for installation.
Anchor straps
in Brick
installation
Double TJI
side load
application
Free standing
fireplaces
Superior
foundation
walls
Anchor straps are not specifically approved by Code for installation in
brick application. Section R403.1.6 only list an exception for anchor
straps that states “spaced as required to provide equivalent anchorage to
½-inch-diameter anchor bolts”. This information would have to come
from the Manufacturers testing data specific to the end use construction
utilized. If the Manufacturer has not tested in this a brick application
strap cannot be used for that application.
Issue brought up about the side load transfer through multiple I-joist
application. Several field application with improper application of the
side loading of a I-joist have been noted recently. All manufacturers will
require some type of blocking/filler to be used and they will provide that
detail. Application detail must be followed without filler blocking
application cannot be approved.
Details vary please check with your manufacturer for correct filler
and nailing pattern requirements.
Question asked about any requirements for free standing fireplaces not
attached to a structure and if they need permits? A detached free
standing fireplace & chimney is exempt from the requirements of the
NC residential code per section R101.2 scope and Chapter 2 definition
of an accessory structure. No permit or inspections are required.
Issue has come up in regards to the requirement to waterproofing these
walls. According to section R406.2 any basement foundation wall in the
State of North Carolina that encloses habitable/usable space must be
waterproofed. So any basement using this type of foundation system
must have waterproofing applied all the way up to finished grade level,
if it’s just a crawl space application then dampproofing may be required
per section R406.1.
2x4 exterior
handrails
Waterproofing
vs.
dampproofing
Kitchen Island
clearances
Secondary
barriers behind
exterior wall
coverings
Still monitoring this issue of getting the option for exterior application
written back into the code for a 2x4 handrail, currently not allowed.
This has been approved by the Building Code Council but has not made
it through the final Rules review committee and cannot be used until it
completes the entire process. Will advise as soon as exception is
available for usage.
Language has changed slightly in the NC2006 Code to indicate when
dampproofing vs. waterproofing is required. Under section R406.2
waterproofing is only required on basement walls, under section R406.1
dampproofing is required on crawl space walls when outside grade is
higher than interior by 12 inches.
Question asked about clearances around a kitchen island and if it needs
to have the same as hallway clearance required under section R311.3 to
be 36”. There is currently no requirement for kitchen island clearance
and this is not regulated by the Residential code.
Secondary barriers will be required under the new Code coming January
1st 2009. All homes will have to have either felt paper or some type of
an approved house wrap underneath the exterior cladding material.