HomeMy WebLinkAboutS100.0 - Framing_Support_AnalysisAugust 6, 2019
Aaron Todd
232 Beechmont Drive
Carmel, IN 46032
Ph: 317.903.8200
Email: AaJTodd@gmail.com
RE: FLOOR FRAMING – STRUCTURAL ANALYSIS
Thank you for allowing Leibering Structural Engineering to provide structural engineering services at the residence
located at 232 Beechmont Drive in Carmel, Indiana. The homeowners are remodeling and requested a retrofit
design in order to allow deep notching of multiple second-floor joists in order to run a drain line through the joists.
The homeowner also requested that LSE determine whether or not a kitchen wall was load-bearing.
Scope
The scope of this project included a site visit and analysis to determine necessary joist reinforcing for the
proposed notching of the joists above the existing kitchen and entryway areas. The scope included a visual
inspection and as-built measurements of the floor framing members. Only those areas readily available and
easily accessible at the time of inspection were included. The site visit was completed on August 5, 2019.
Framing
The existing second-floor framing consists of 2x8 wood rafters at 16” on center. The floor joists are supported by
two exterior walls and one interior walls. The joists span 12’ and 13’. The proposed remodel includes routing the
plumbing drain line (3” Sch 40 PVC, 3.5” OD) through four total joists, two in each of the spans. The second-floor
joists on each side of the south kitchen wall run parallel to the wall and, as such, the wall is non-load-bearing.
Design Criteria
The joist reinforcement analysis uses a floor live load of 40psf, a dead load of 15psf, and a minimum total
deflection of L/360.
Assumptions
The new and existing wood members are assumed to be a minimum grade of SPF #2. The notch will be a
maximum of 3.75” wide and 3.75” tall. The top of the notch must be rounded so as not to create a sharp corner.
Design
See the attached detail for the joist reinforcement. The reinforcement detail calls for a 2x4 to be sistered to the
existing 2x8 joist using glue and nails. The new 2x4 shall extend from the existing load bearing wall to 12” beyond
the center of the proposed notch. Blocking shall be provided between the end of the 2x4 and existing load-
bearing wall top plates. A Simpson LSTA18 strap shall be centered on the notch and nailed to the bottom of the
existing joist using 10d common nails. The center of the notch shall be located between 9” and 12” from the face
of the existing load-bearing wall
Closing
Please note that the inspection was only visual in nature, and there was no material testing or sampling of any
components in the roof framing system. Also note that this inspection only considered the overall performance of
the framing system as described above. The observations and recommendations are professional opinions based
on engineering principles and evidence visible at the time of the inspection. Lastly, please note that due to the
subjective nature of this work, it is possible for other professionals to have differing opinions or interpretations of
the abovementioned observations.
Sincerely,
Justin Leibering PE, SE
Leibering Structural Engineering
APPENDIX A – PHOTOS
Photo 1 – Non-Load Bearing Wall