HomeMy WebLinkAboutBLD-18-1340 ADB Consulting Engineers, Inc.
November 1,2018
Mr.Richard Garvey
25 Tee Way
Yarmouth,MA 02664
Subject: Garvey Residence,25 Tee Way,Yarmouth,Massachusetts
Dear Mr.Garvey:
This office has completed our structural investigation and field inspection of the newly
installed exterior OSB shear wall sheathing elements completed along the referenced
residence in Yarmouth,MA on October 29,2018.
Based the condition of the existing exterior OSB shear wall sheathing some areas along
these elements need to conform to the Massachusetts State Building code with respect to
structural adequacy.
After new 8 penny nails are added as needed between (spaced equal distant between two
8 penny nails)the ineffective recessed 8 penny nails(countersunk below the exterior
surface)as found in the field and the OSB shear wall sheathing areas will then conform to
the Massachusetts State Building code with respect to structural adequacy.
This evaluation was based on observed measurements along existing exposed (non-
concealed)areas of the building found when a field reconnaissance and tactile inspection
when completed by the engineer. If additional engineering data,plans and tests are
brought to the engineer's attention in the future the recommendations and results
presented herein may be altered as determined by the engineer.
If you have any additional questions regarding this matter,please feel free to contact me
at your convenience.
Sincerely
_tot ong4s,
4 O
in
8 STRUCTURAL
No.40f 7
Joseph D.Bianchi,P.E.,S.E.
Enclosed: Computations for 01808-061-02-Garvey Residence Yarmouth,MA
835 Samoset Rd., Eastham,MA 02642
Telephone:508.255-1422
www.ldbse.com
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Existing 1/2 in. siding OSB:
Project:01808-061-02-Garvey Residence-Siding Envelope Investigation,Yarmouth,MA
Studs 2"x6"@ 16 in.O.C./Edge nailing 4"O.C.&Vertical nailing 6"to 8"O.C.with 8d nails
Date: October 30,2018
INPUT DATA:
Horizontal braced nailing length of existing oriented strand board without openings - L„ (ft.);
Effective factor(65%)- K (unitless);
Recommended shear in pounds per linear feet - F„ (lbs./ft);
Wind force load (Exposure B @ 120mph alongA&C End Zones - Wf (lbs./ft2);
hilt= L4,=2(32f + 5211)0.60
wily= 100.8 ft
1n121= K=0.65
ou121. 0.65
lbs
1n131= F„=230—
ft
230 lbs
Oug31=
ft
lbs
111141= W,=20 2
ft
20 lbs
Ou1141.
ft2
RESULTS:
A.65%effective capacity of existing shear walls (recessed nails) V.a, (lbs.):
Ires1:= V..p= K Lu F„
our* 15069.6 lbs
B. Shear applied along resisting walls Va(lbs.): 7
ms1:= V8= N[8 1111J((32ft)2 + (52 11)2) + ((32 11)2 + (26 11)2))(._!__) W1,
ou161_ 16366.1 lbs
•
2 I 01808-061-02-Garvey Residence-Siding Envelope Investigation, Yarmouth,MA.nb
C. 100%Effective capacity of existing shear walls Vcap (lbs.):
infra- Vcap= t++ Fv
oNm= 23184. lbs