Building Comments 1 - structural - consultant.pdfBeck & Associates, PLLC
Structural Engineering & Code Consulting
August 29, 2017
Leif Bjorback
Building Official
City of Edmonds
121 5th Avenue North
Edmonds, WA 98020-3145
Subject: Westgate Village (Structural Review)
Permit: BLD2017-00899 and BLD2017-00900
Per your reques t, Beck & Associates has completed a structural review of the drawings and
calculations for conformance with the 2015 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. Corrections and revisions to the drawing should
be clouded so that they are clearly identifiable.
General
1) All exterior deck framing members should be clearly identified as preservative -treated. A not is
included in the General Notes. However, it is prudent to clearly identify them as preservative -
treated on the plans to ensure proper construction.
2) Provide an analysis for design of basement retaining walls (E/54.1).
Lateral
3) Provide calculations for determination of the overall seismic weight used in determining seismic
forces. The seismic weight is required to include dead loads of all elements including the weight
of non-structural partitions, exterior walls & cladding, etc. Revise the design as required. ASCE 7-
10, 12.7.2
Drawing Sheets
51.0—General Notes and Special Inspections
4) Reference the Structural Loads section.
a) Decks are required to be designed for a live load of 60 psf. 1607
i) This needs to be identified in the Structural Loads section of the General Notes.
ii) Update the calculations of decks and update the drawings as determined by the
analysis.
16425 SE 66th Street, Bellevue, WA 98006 • beckpllc@msn.com • PH: 206-313-3739
Permit 2017-00899 and 2017-00900 (Structural)
August 29, 2017
Page 2 of 3
5) The Foundations section should be updated to include all geotechnical recommendations
utilized for structural design, such as active lateral wall earth pressures, passive earth pressures,
coefficient of friction, seismic surcharges, etc.
S2.2 — Roof Framing Plan Building-1
6) Section cuts C, F, & G/S6.0 should be called out at all locations where they occur on the plans in
order to ensure proper construction and inspection.
S3.0—Foundation Plan Builidng-2
7) It appears that detail E/S4.1 should be called out on the plans at the following locations. Update
the plans accordingly.
a) Grid A between grids 1 & 1.5
b) Grid E between grids 1 & 3
c) Grid D between grids 3 & 5
8) Specify continuous footing sizes for the footings located on each side of the stairs.
9) It appears that a foundation wall is required under the bearing wall located along gird 3.3. Please
coordinate.
10) The footing along grid 4.5 should be extended upward (west) to pick up bearing loads from
above.
S3.1— First Floor Framing Plan Building-2
11) The following beams support discontinuous shear walls and holdowns from above. These beams,
and their end connections to framing below, are required to be designed for seismic loads
considering overstrength. Provide an analysis for the design of these beams and update the
drawings as determined by the analysis. ASCE 7-10, 12.3.3.3
a) Beam G3
b) Beam G8 (2 locations)
c) Beam G18
12) Where shear walls are discontinuous, the design seismic forces are required to be amplified by
25% for design of the following elements. Provide an analysis and update the drawings as
determined by the analysis. ASCE 7-10, 12.3.3.4
a) Connections of diaphragms to vertical elements and to collectors
b) Collectors and their connections, including connections to vertical elements, of the seismic
force -resisting system
S3.2 — Second Floor Framing Plan Building-2
13) Provide an analysis and design for shear transfer to the shear walls located along grids 2.5 and
3.5 (Shearwall-C and Shearwall-D of the calculations). It appears that collectors and/or increased
diaphragm nailing may be required.
S3.3 — Roof Framing Plan Building-2
16425 SE 66`h Street, Bellevue, WA 98006 . beckpllc@msn.com . PH: 206-313-3739
Permit 2017-00899 and 2017-00900 (Structural)
August 29, 2017
Page 3 of 3
14) Section cuts C, F, & G/S6.0 should be called out at all locations where they occur on the plans in
order to ensure proper construction and inspection.
S3.4 — Key Plan for SW and Bearing Stud Wall (First Floor) Building-2
15) It appears that a holdown is required at the lower end of the shear wall located along grid 3.5
between grids A & B (Shearwall-D1 of the calculations). Please review this condition.
S5.0 — Floor Framing Sections & Details
16) Reference details H & J/S5.0. Specify required connection of the blocking to the shear wall top
plate below.
S5.1— Floor Framing Sections & Details
17) Reference detail F/S5.1. Specify required connection of the blocking to the shear wall top plate
below.
S6.0 — Roof Framing Sections & Details
18) Reference detail F/S6.0. Identify all elements in order to provide shear transfer from the roof
diaphragm to the shear wall below.
Please contact me should you have any questions.
Respectfully,
Douglas Beck, PE, SE
Beck & Associates, PLLC
16425 SF 66`t' Street, Bellevue, WA 98006 . beckpllc@msn.com . PH: 206-313-3739