HomeMy WebLinkAboutDOCS - 05-00169 - 1129 Golden Willow Cir - New SFR12
01OHNSO
H E A T I N 611;
City of Rexburg,
Heating calculation for home. Permit # 05-00169
1129 golden willow circle, Rexburg, Idaho
As per the REScheck provided by the contractor the heat loss for the home is figurers as
follows.
UA value: 329, (F -GS Lw"---k�
Delta T: 100. F
Heat loss; 32,900 BTU
Infiltration value: .95% = 3 1.255 BTU
Minimum BTU required = 64,155 BTU
With the possibility of future Air — Conditioning it is required to provide a 4 ton capacity
fan blower,
iits proposed to install a I 00,000 BTU fumace with a 4 toy. blower.
I have also included a layout of proposed ductwork sizing and location drawn on blue
parrots provided from contractor.
Johnson Heating LLC
HVAC License # 1327
State of Idaho
e 646 Willowbrook Cr.
e Rexburg, ID 83440
0 (208) 356-0525
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AK RIVER CHAPTER
POBOX 50220, IDAHO FALLS, IEDAHO - (208) 612-8271 or (208) 782-3180
FEBRUARY 17, 2005 CODE COMMITTEE REPORT
2" X 299 FOiJNDATION WASHERS IN IRC
Section R602.1 1.1 of the 2403 Intemational Residential Cade (IRC) requires the use of a minunum I/a inch by 3
inch foundation sill plate washer in Seismic Design Categories D1 and D2 and Townhouses in Seismic
Design Catet:D(yory C. However the 2003 Mternational Building Code (E3Q allows the use of a 3116 inch by 2
inch by 2 inch plate washer in all Seismic Design Catecrories D and E by Section 2308.12.$. From the 2000 IRC
+Cornmentazy and the 2d03 IBC Structural Q&A Application Guide we fmd the mason stated for the 2x2 washers
was to compensate for the common construction practice of over sizffig bait hakes up to 1/� inch.
The AF & PA 2001 National Des'ga Specification Section 11.1.2.2 used as a referenced standard iu bath the
2003 IBC and .IRC states that such a silk plate bolt hole shalt be a maxim -um of 1116 inch larger than the no al
bolt diameter. The larger square washers enable the nub to apply enough clamping action between. the sill plate
and foundation to pz-event longitud�nal splitting of the si11 plates and doss of lateral load capacity. Cyclic testing
after the 1994 Northridge Earthquake was used to verify the 2x2 washers were sufficient to provide the added
surface area needed. This only works though if the outs are tightened sufficiently.
In the April 2002 ICC Code Change Heari�ags the Building Seismic Safety Council Cede Resource Support
Com-mittee (_BSSC-CRSC) submitted Code Change RB82-02. This change added the 30 requirement to the
2443 IRC. The reason given for the cede change was to Carrespond to the 2000 ITE Section x '42. 5.3
recomniendzng closer spacing between braced wa1�. Tines. Na data was given to suggest the 2x2 washers were not
sufficient as used in the 1$C. NEHRP as similar to the odd "pi's only a recommendation" code put out by HUD.
On February 17, 2005 the Snake diver Chapter of the futemational Code Council. mit and reviewed the above
information. The members present voted to recommend the use of the 2x2 SBC compliant washers in IRC
applications under IRC Section R104.11 Alternate Methods of Gonstruct�vn. The l.f 16 iueh maximum over
sizing of holes wi11 still be z-equired or the 3x3 washers will have to be used in Design Category D. The use of
2x2 washers in Desip Category C dor ;/4 inch oversized holes was also recommended as an option to replacing
the sill plates. Also, the 2003 IBC Structural Q&A Application Guide does not recommend cvunters:uxkiilg of
foundation sill plate anchor bolts without an engineered design. accounting for the reduced in-pIan.e shear.
The above information i's onl
Codes ee Chairman
Snake River Chapter ICC
uideline and does_ not su
e the local Buildin
Officials autboxitv!