WJA - Harbor Sq Dome Struct comments 3.doc
MEMORANDUM
Project: Dome Replacement (Resubmittal 2) PROJECT NO. : 0601-E
To: Theresa Umbaugh DATE: 29 Nov 2006
COMPANY: City of Edmonds TOTAL PAGES: 1 of 1
FROM: Doug Heit PE & Robert Stevens PE
SUBJECT: Structural Review comments (Plan Review No. 06-0854)
REVIEW COMMENTS:
The following is a list of review comments, with all outstanding items in bold:
Provide all information listed below.
1)
The Construction Documents shall show the following information in accordance with
IBC 2003 Section 1603:
a) Ground snow load
b) Flat roof snow load
c) Snow exposure factor
d) Snow load importance factor
e) Thermal factor
f) Wind importance factor and building category
g) Seismic importance factor
h) Ss and S1
i) Site class
j) Sds and Sd1
k) Seismic design category
l) Basic seismic force resisting system(s)
m) Design base shear
n) Seismic response coefficient Cs
o) Analysis procedure used
2) Seismic Zones per IBC 2003 - addressed by architect.
3) Wind Exposure - addressed by architect.
Provide sealed and signed calculations for all roof/wall components.
4)
Roof/wall system component structural calculations, drawings, and specifications shall
bear the stamp of a qualified Washington State professional structural engineer.
5) Double service door - to be addressed in No. 4 above.
Provide calculations that include Factor of Safety against uplift. Also, if
6)
foundation/soil interaction is being used to resist uplift, provide a Geotechnical
Report that indicates allowable soil properties.
The Farley Group calculations indicate 1643 plf maximum vertical uplift load per side.
The existing 4’-6” x 1’-6” grade beam, however, weighs 980 plf. Clarify uplift load
resistance, and verify conformance with IBC 2003.
7) If existing restraint cables are being reused, confirm that the cables and connections are
suitable for re-use from a loading and corrosion standpoint – addressed by Jason
Schmidt, Design Manager, Farley Manufacturing, Inc.
8) Provide letter from licensed Mechanical Engineer – addressed by HV Engineering, Inc.