approval letter sample 02-17-2012
Jennifer & Ricki Carroll February 17, 2012
216 Spring Street
Florence, MA 01062
Subject Location: 216 Spring Street
Map Block: 22 - 029
Mr. & Ms. Carroll,
These are some items that
will require attention:
See zoning requirements attached, If there is ground water upon excavation a dry well will be requires for any foundation drainage.
As of August 4th 2011 the
8th Edition MA code is the 2009 IRC with MA amendments.
In the following are some generic requirements which seem to be problematic.
This is not a substitute for purchasing and reading
the MA codes.
Structures shall conform to 780 CMR 8th Edition 1 and 2 family building codes with MA amendments.
Grading plan for structures being constructed required. 780 CMR R401.3
for drainage requirements.
A basement drainage system is required in all basements 780 CMR R405.2.3. except those in group I soils (table R405.1)
Foundations that retain earth and enclose
interior space require damp proofing 780 CMR R406.1.
Ceiling joist are intended to prevent spread, once raised above the wall plate they become rafters ties and may require up sizing
of rafters and increased nailing for example with a 4” slope 8-16nd common are required at each connection. 780 CMR R802.3.1.
Steel straps over the ridge or 1x4 minimum collar ties
are required 4’ OC in the upper 1/3rd 780 CMR R802.3.1
Ridge boards must be the full depth of the cut. 780 CMR R802.3.
A complete window and header schedule is required. 780 CMR Table
R502.5 for header sizing and number of jack studs required.
All framing materials which are not code prescriptive must have stamped engineering.
LVLs
I-joist and or Floor Truss
Roof
truss
A braced wall plan identifying appropriate braced wall areas and braced wall method being used. 780 CMR 602.10.
Garage corners and large corner window/door layout may require special
solutions.
All corners must be appropriately attached to the foundation.
Ceiling heights minimum 7’ for habitable spaces, 6’8” for bathrooms includes tub/shower area if a shower head
is used, 6’8” for basements, 6’4” at beams/ducts. 780 CMR R305.1. MA amended
Hazardous glazing locations, within 24” of a door, or within 60” of a stair, or across from hot tubs, spas,
bathtubs within 60” if not 60” above the walking surface, and other locations. 780 CMR R308.4
Windows over 72” above grade with the opening less than 24 above the finished floor shall
meet the 4” sphere rule. 780 CMR R612.2
Egress and emergency escape requirements shall be strictly met.
Basements, habitable attics, and all sleeping rooms require emergency escape.
780 CMR R310
Windows within 44” of floor, DH 3.3 sqft min window size, Casement 20”x41” exception 5 sqft at 1st floor. Minimum clear opening 20”x24” or 24”x20”. 780 CMR R310.1.1
Two doors remote
as possible at the normal level of travel, opening measured from the face of the slab to the stop with door at 90 degrees, one 32” and one 28” minimum 78” high. 780 CMR R311.2
Landing
at each door 36” out and the width of the door minimum 36”, maximum step 7 ¾” from the top of the threshold and only in-swinging doors. 780 CMR R311.3
Stairs have critical standards,
make sure you know the floor finishes when planning. Minimum tread 9”, maximum riser 8 ¼”, maximum overall variance for the run is 3/8”, 4” sphere rule on risers, 4 3/8” on balustrade,
6” in the triangle. Graspable rail 1 ¼” minimum and 2” maximum rail, height minimum 34” maximum 38”, required for 4 or more risers. Landing to landing constitutes a new run. Minimum
6’8” ceiling height from nosing. 780 CMR R311.7.
Guards 36” minimum height above walking surface, a bench is a walking surface, required for more than 30” above floor or grade within
36”, 4” sphere rule. 780 CMR R312.1.
Educate the plumber and electrician about maximum notch and hole sizes, and placement. 780 CMR R502.8 and R602.6. In bearing studs holes not larger
than 40% of a stud no closer than 5/8 to the edge, In interior non-bearing studs holes not larger than 60% of a stud no closer than 5/8 to the edge, in bearing walls if more than 50%
of a plate is cut or notched a 1 ½” 16ga. strap must extend a minimum of 6” past the cut both directions and be nailed with 8-10d per side, or holes in joist are a maximum 1/3 the depth
not closer than 2” from the top or bottom. Notches are different.
Fire and draft stopping shall be completed before rough inspection. 780 CMR R302.
Ignition barriers in place before
final. 780 CMR R316.
Energy aspects shall comply with the stretch energy code. 780 CMR Appendix 115AA and 2009 IECC.
An initial HERS evaluation is required including insulation levels
anticipated.
A final HERS evaluation confirming code requirements have been met including duct testing.
Energy information including mechanical equipment posted on the electric panel.
Remodeling
and Additions can be completed in accordance with IECC 2009 with Energy Star Building Option Package.
Vapor retarders. Although these are still in the code there are exceptions, one
must understand that there is a difference between a vapor retarder or barrier and an air barrier. An air barrier is intended to stop air flow (convection) a vapor retarder or barrier
is intended to stop molecular moisture transfer (diffusion). A vapor retarder or barrier is effective even if there are some holes or gaps, however an air barrier has to be absolute
and complete. If air can leak through an electrical device or through a crack it follows the path of least resistance and carries 99% of the moisture in a structure. This is evident
every time one exposes fiberglass insulation and finds black insulation, which is dirt filter out of the air moving through the insulation. 780 CMR R601.2 for vapor retarders and Table
N1102.4.2 for air sealing requirements.
Unvented attic assemblies. Hot roofs are allowed, but have specific requirements 780 CMR R806.4.
Deck ledgers and post must be appropriately attached,
bolts or lags. 780 CMR R502.2.2.1 Note: ThruLoks are engineered for post attachment supporting a railing.
Smoke and CO detectors as required. 780 CMR R314 and R315.
Closets beneath
stair which have doors must be drywalled with ½”. 780 CMR R302.7
Relevant items must be submitted to the building department for approvals before inspections and or CO can be signed.
Other items are intended to avoid costly issues at inspections.
Feel free to call if you have any questions. My telephone number is 587-1240 and office hours are Monday through Friday, 8:30 am to 4:30 pm, excepting we close for walk-ins at 12:00
noon on Wednesdays. My email address is: cmiller@northamptonma.gov
Thank you for your cooperation on these matters.
Chuck Miller
City of Northampton
Assistant Commissioner and Zoning
Enforcement