2013-0562 Community Health - Structural.pdf
June 8, 2013
Leif Bjorback
Building Official
City of Edmonds
th
121 5 Avenue North
Edmonds, WA 98020-3145
Subject: Community Health (Structural Only Review)
Address: 23320 Highway 99
Permit: 2013-0562
Per your request, Beck & Associates has completed a review of the
structural only
drawings and calculations for conformance with the 2009 International Building Code
(IBC), as adopted and amended by the State of Washington and the City of Edmonds.
Our review of the plans and calculations indicates that corrections are necessary prior to
permit issuance. The applicant should address the following comments in itemized letter
format in addition to making corrections & revisions to the drawings.
General Notes (S1.00-S1.04)
1) Reference the Design Criteria on S1.00. According to the calculations, the dead load
nd
used for design of the 2 level floor is 28 psf, not 80 psf as specified in the Design
Criteria. Please clarify and update either the design or the General Notes as required.
2) Reference the Lateral Forces section on S1.00. The General Notes should identify
the lateral force resisting systems utilized for the building: ordinary concentrically
braced frames and special reinforced concrete shear walls.
3) Reference the Splice Schedule on S1.01. Specify the concrete compressive strength
on which the splice schedule is based.
Geotechnical
4) The Riley Group, Inc. recommends that the project plans and specifications be
submitted to them for a general review to confirm that the recommendations in
geotechnical engineering report have been interpreted an implemented properly in the
construction documents. The Riley Group should provide a letter of review indicating
that their recommendations have substantially been incorporated into the project
plans and specifications. Where corrections or additional recommendations are
required based on the geotechnical review, those corrections and recommendations
need to be incorporated into the plans and specifications prior to re-submittal of the
plans for our review.
Lateral
5) It appears that the design of the lateral force resisting system will need to consider a
redundancy factor, rho, of 1.3. Provide an analysis for determination of rho in each
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June 8, 2013
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direction. Revise the lateral design as determined by the analysis. ASCE 7-05,
Section 12.3.4.2
6) Horizontal reinforcement in structural walls is required to terminate at the edges/ends
of structural walls with standard hooks engaging the edge reinforcement.
Alternatively, the edge reinforcement should be enclosed in U-stirrups having the
same size and spacing as, and spliced to, the horizontal reinforcement. Update the
drawings accordingly. ACI 318-08, Section 21.9.2.3
7) Collector elements with compressive stresses exceeding 0.2 fc at any section are
required to be provided with transverse reinforcement satisfying 21.9.6.4(c) over the
length of the element. Provide an analysis of the collector elements to determine if
the stresses exceed 0.2 fc and provide transverse reinforcement as required. ACI
318-08, Section 21.11.7.5
S2.01G Grade Level Framing Plan
8) Section 3/S3.10 and 4/S3.10 are cut on the plans. These detail references appear to
be incorrect.
9) Reference the column located at grids B & 4.5. Detail 5/S3.00 is called out as the
foundation for support of this column. Please review this condition and provide an
analysis to demonstrate that the foundation has adequate strength for the imposed
forces.
S2.02 Floor Framing Plan
10) Reference the column located at grids B & 4.5. This column supports the end of a
braced frame which is discontinuous at this level. As a result, it is required to be
designed for loads considering overstrength. Provide an analysis to demonstrate that
this column has adequate strength. Revise the design as required. ASCE7-05,
Section 12.3.3.3
S3.01 Foundation Details
11) Reference detail 4/S3.01, Typical Concrete Column at Spread Footing. Transverse
reinforcement in columns is required to comply with Section 21.13 of ACI 318-08. The
engineer should provide calculations to demonstrate that adequate transverse
reinforcement is provided in the concrete columns. ACI 318-08, Section 21.13
S3.21 Framing Details
12) Reference 4/S3.21. Review the connection of the beam to the concrete wall. The
detail referenced is for a typical beam condition. However, this condition is where a
braced frame occurs. Provide an analysis for the design of this connection and
specify all connection requirements. Revise the design as determined by the
analysis.
S3.30 Concrete Wall Elevations
13) Reference 1/S3.30.
a) According to the calculations (9) #9 threaded for coupler at collector are required
to be provided (p. LA-164). Currently, (6) #9 are specified. The number of
required collector bars needs to be coordinated with detail 3/S3.15, as well.
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June 8, 2013
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b) The design of the concrete wall is based on tank design principles. However,
there is no wall framing perpendicular to the wall along grid B. Please review this
condition and revise the design as required by the conditions.
Please contact me should you have any questions.
Respectfully,
Douglas Beck, PE, SE
Beck & Associates, PLLC