HomeMy WebLinkAbout05020028-CorrespondenceJune 22,2005
Jay Smith
U.S. Housing Components
PO Box 428
3926 West Highway 14.6
Buckner, KentUcky 40010
RE: R334 Curtis Residence. Indianapolis, Indiana
Dear Jay:
Per your request, we have reviewed the nformation you provided us regarding the roof system at
the above project and are prepared to provide an opin on regarding the suitabil ty of the trusses
and framing system at the two particular locations discussed below:
Issue i: R3A/R4 at Donner.
At th s location the R4 tresses are stubbed at a 2-ply 2x 12 header which is supported at each end
by a single ply R3A tress. Both the R3A and the R4 trusses pck up intermediate bearing at an
interior bearing wall. This additiona bearing reduces the cad at the end of the R4 truss which, in
tum reduces the load at the ends of the 2x15 beam that must be supported by the R3A tress. We
have reviewed the loading used for both the trusses and beam design and found it to be
appropriate for this condition. No corrections or modifications are required. This observfition
assumes that all connections between tresses and beams are appropriately sized and made and
that both plies of the 2x 12 beam have been fastened together to act aZ a single structural unit.
truss designs
joint "E" on RI0)
cases the truss analys~s
or members Truss loading was checked and found
corrections or modifications are required. This
g s nstalled from the underside of the top chord to
ate bearing for the R9 and RI0 and that connections
I the trusses being supported are properly sized and
COlltaet us.
ect. Should you have any
CONTROLS
Solid Sawn Hem. Fir #2
)ESIGN
LOADS LISTED
104~3989 ~. --
· _=
Del oct[on Cr terJa: STANDAR D(LL:LJ360,TL;L/240). .
-Bracing(Lu): Alt compression edges [op and bet om) mus De oraceo a 7 l0 o c un ess ae ae¢ o her~v se. Proper attachment anO positioning of
lateral bracing is required to achieve member stability.
-The aliowab e shear stress (Fy) has not been increased due to the potentia, ot splits, checks and shakes. See NDS for applicabilily of increase.
-Analys s based on ve.'lJcal oeds only and assumes structural supporls as noted n the input. Axial loads are not considered in this analysis.
.Aha ysis assumes continuous member. Lap joints, splices and finger joints significantly reduce member performance and have not been considered
-Design assumes adequate continuous late al support of the oompression edge.
PROJECT INFORMATION:
OPERA OR INFORMATION:
Jay Smith
US Housing Componen[s
3926 West Hwy. t46
P.O. Box 428
Buckner. KY 40010
Phone: 502-222~7180
Fax : 502-222-7136
jsmith@ushsg.com
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