HomeMy WebLinkAboutMULT DOCS - 06-00507 - 327 Talon Dr - New SFRD Y E R
G R O U P, c
ENGIN SERIN G - PLA N NI I N G - MAS GLE M 4 N 1
November 21, 2006
Quinton Owens
City of Rexburg Building Department
P.O. Box 280
Rexburg, ID 83440
Rem. Eaglewood Block 1 Loi 5 Residence jed'Whyte)
Dear Quinton-,
NOV
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We have been informed by the builder that you have ident"Ified Code concerns on the lateral
transfer of forces through the garage and basement fa-mily room The purpose of this
letter is to address these concerns by providing recommended courses of action to address
them.
On the garage situation, the contractor will need to implement a sfructural treatment for this
sjtuat�on by adhering to the following speciflications: .
• On the south (Tront) garage wall, construct sheathed, braced walls (blocked) each side
of the large garage. door openings and also above the' headers above the garage door
openings. Sheath inside and out. Alternately, use Simpson Strong Wall Garage Portal
System or approved equal.
Positively anchor -the braced wall system to the concrete foundation with appropriate
anchorage using Simpson HDU or HDQ,8 connectors with SSTB anchor bolts,'or
approved equal.
Make the headers above the large garage'
door openings continuous and extend them
through'the sheathed walk area an each side of the opening. Fasten sheathing to the
extended headers per IRC.,
Oen the easy and west (exterior) garage walls, sheath the wall on the exfierior, construct
wall framing per ARG 602.3(3), and redu�e nailing pattern from 6" to �" per IBC (- 4 0 °l0
increase in load capacity}. She.etrcck invertor side of wall and fasten per IRC 702.3.5.
8asement Family Room Area
The concerr for transfer of 1:.:.�Itenql forr-yQ in thi:a hasemcint r n-, r 'arises -Ir �lilt[
size or maximum square footage lTi C2tlon � n triprescriptive 2003 International Residence
Codi, which h City of Reh2S 2d0pted 'Building
Code, 2003 .=_.ditlon.
We nage that under the IBC (design code) (hese limitations are not an issue ar" concern if pro -per
design specifications are app[ied. VVe therefore will require the following structural treatment on
L DYER GROUP, LLC * 10 N 2ND EAS I . SUITE 153 e REXE3URG, ID 83440 - 1681
20 8 - 05 5 6.8800 (Vof . 1 . (TOLL F IF_T'r) � 202 -6 6. B608 (FAX) -a 208,39 C - 97 0 LL
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this residence to incr�ase the load carrying capacity of the structure and Mitigate lateral force
diStdbuflon concerns:
•
S h eath the rtorih and east exterwior wads (studs 16 c. c. maximum) and red ce the
naiiing patiern from 6" t0 4".
On the west interior wail of the Tamil rooms construct wall framing at 16" z
. , r�x� rel ,.
PSL 4'"�L r ti #-& 1 � � 1 Y 14 r --t �iy s i r � � � � J � � +,+�� a z,� � �.�..�� 7 � .+4 .�. r � �'l �% ""7 �'a �`'+, A � f
I I C1 Ll a b i i s � L] 1 �� �� r �� rfasten I in screws,
at 12" o.c. ma-vimum.
Acco rci
ng to IBC, phis treatment will allow a 40% increase in the lateral force carrying capability
of the structure which will be sufficient to cagy the'required lateral forces.
Conclusion
Co-ncerns have bean expressed by the Building Department over proper transfer of lateral
forces in ane garage and basement family rooms arias. We are requiring the above-specified
structural treatments to provide the adequate structural performance required for this structure.
Your review and approval of the same will be most appreciated. As always, please feel free to
contact us if you have any fu_rther questions or concerns.
Sincerely,
The Dyer Group; LLC
Winston K. dyer, PL
Idaho Structural Engineer # 43'[5
cc: Ted Whyte
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