HomeMy WebLinkAboutEngineer Report 05.17.16Studio M Engineers, LLC
Structural Engineering Consultants
May 17, 2016
Innovation By Perception
www .mbengineering.elementfx.com
studiom.engineer@gmail.com
Hector and Enrique Webber
patchmaninc@comcast.net
Re: 226 County Road 126
To Whom It May Concern:
My office was asked to inspect the installed L VL floor framing condition at the residence
located at 226 County Road 126.
Very basic construction plans were available for my review at the time of inspection. The
origin of the plans was not identified on the title-block. In addition, I was provided a
letter from the office of Oddo Engineers. The letter did not address any notching in the
floor framing members, nor did it identify 11. 7 /8" L VL joists as the preferred, and
engineer approved framing member for the cantilever bump out addition.
The floor framing in question is located below a bathtub bump out addition located on the
north side of the residence, on the main level floor. The bump out was accomplished with
11. 7/8" LVL companions bolted to 11. 7/8" I Joists. The L VL's extend approximately
8' -4" from the bearing point (concrete wall) to the South. They do not extend the full
length of the I Joist to which they are companioned. The assemblies are bolted together
with W' diameter bolts at a 6. *" guage and are spaced at approximately 28" on center.
The LVL's had been notched to accommodate existing plumbing lines running in the
East-West direction. The depth of remaining member at the notches was 7. 7/8". The
notches occurred in several locations along the member length. No notches occur in the
cantilever portion below the new bathtub bump out.
Analysis: The floor framing in question was analyzed using the 2009 IRC building code
and supporting supplements, specifically the 2012 NDS for wood construction.
Loads used in the analysis are as follows
• Floor Live: 40 psf
• Floor Dead: 15 psf
• Loft Dead: 10 psf
• Loft Live (storage load): 20 psf
• Roof Snow Load: 40 psf
• Wind Load: 90 mph Exposure 8.
• 308 N. Hyland Park Dr. • Glenwood Springs • Colorado • 81601 • 970-366-8690
~ FRAMING PERSPECTIVES
";res:
1. Fl.OOf< SHeA THING NOT SHOWN FOi< CL.Al<ITY.
~ STI<UCTUAAL FAAMING LUMBER SHALL BE DOUGL..1'15 Fll<
01< HEM FIR, WITH THE FOLLOWING GR.ADES (MINIMUM):
-JOISTS AND RAFTEl<S: 1*2
-PL.ATES AND STUDS: **2
-RECTANGULAR COLUMNS 1*2
BEAMS SHALL BE DOUG Flf< NO. 2 01< BETIER.
4 PROVIDE CONT. BLOCKING AT THE LOAD BEARING
LOCATIONS OF Al.L JOISTS AND AAFTEl<S
5. PL.UMBING NOT SHOWN FOi< Cl.ARIT"r'.
6 l..AMINATED VENEER LUMBER (L VL) PL 'I'S SHALL ee
1-3/4" THICK AND SHAU-HAVE THE FOLLO\VING
MINIMUM ALLOWABl..E STRESSES: Fb--2,600 PSI,
Fv-..285 PSI, 5::1,800,000 PSI.
CANTILEVC~
n. 11e·1..VL I
(J. 118' A1' N01'CH)
TYP.
CANTll.EVE~
TI. 718" LVL ii¥:· A:~~CH) J
"' <08~8 ~~~i
Ol()U>tl "' -., , ~s~~ -t;iG
i"
~ UI ~~ Q S2 co
~ s: . ,..,,
() z o~ zZ
U1 rn c I'll ~~ )> • z r-
-1 r-ill()
(J)N
-ON ::0 O>
-("') Zo G>c Nz ~~
::0 ::0 mo ~)> oO
o~ mN r0>
UlOOO
Q ~ \!! ~ Fft .. (;\ '.'.'l
• U'I z,.,,
:J>·"'O Ul -0
Ul ~ or ~
:IN°<" 92~~ ~O"IOIOI
~ ~
Typical Notched L VL Member
Conclusion: The cantilever L VL joists are generally acceptable as installed. They will
require a nailing pattern of 8d at a spacing of no more than 10 inches on center from the
floor sheathing above (nails installed through floor sheathing, into top edge of the
LVL's). The sheathing was not completely installed at the time of my inspection.
Limitations:
• The areas that I observed were readily accessible using conventional means of
access and observation. Likewise, framing and structural system deficiencies that
were hidden behind finishes or obstructed from readily available points of visible
access may exist, and would similarly invalidate the conclusions in this letter.
Such anomalies should be reported as/if they are discovered.
The statements or lack thereof, made during the site visit do not express or imply code
compliance with systems beyond the scope of work identified in this report.
This concludes this report. Please contact my office with any questions or comments.
Sincerely,
Michael J. Baca, P.E.
Principle Structural Engineer
Enclosure: S I
• 308 N. Hyland Park Dr. • Glenwood Springs • Colorado • 81601 • 970-366-8690