Report (21) /pcX)L( — BU'S5
FILE COPY /3 ,2,.
WD Y Structural • Civil Engineers
December 20, 2004
EEA Architects
1230 SW First Avenue, Suite 300
Portland, Oregon 97204
Attn: Sean Scott
RE: Alberta Rider Elementary School
SW 130th Avenue & Bull Mountain Road, Tigard, Oregon
Permit#BUP2004-00529
Plan Check Response/ December 13, 2004
WDY, Inc. has completed the response to the structural comments of the plan review for the above
mentioned project, issued by City of Tigard Building Department December 13, 2004. As you
requested, we have enclosed 8-1/2 x 11 copies of the drawing changes and the full size drawing
revisions will be completed soon.
Item 1: Per the drawings, 3500 psi concrete is only used for slabs on metal deck. In specification
section 03300 part 2.09 item C2, the reference to structural slab, beams and columns is
not applicable.
Item 2: Specification section 03300 part 3.04 item D lists acceptable lap splice lengths "or as noted
on the drawings". Per the drawings, lap splices in walls and footings are to be 45 bar
diameters.
Item 3: All masonry design was based on f'm=2,600 psi. If CMU is substituted for brick, f'm=2,600
psi is required. Specification section 04220 part 2.02 item B should be modified to reflect
this requirement.
Item 4: The library area is not a stack room so the code required live load is 60 psf(reading
rooms). The floor framing design in this area is conservative.
Item 5: Calculations for retaining walls 10a, 10b and 10c on S6.1 are on pages M8 through M11 of
the original calculations. Calculations for the retaining wall at the elevator pit are on
enclosed pages Al to A3. The basement wall will span horizontally to the side walls of the
elevator which extend to the main floor (pg A3). The top of the wall is restrained by the
slab on grade. The footing design is governed by sliding and a footing 10c/S6.3 by itself
would have a sliding factor of safety of 1.15 (pg A5). The additional required sliding
resistance is provided by the elevator slab weight and passive pressure on the south wall
of the pit (pg A4). The drawings have been revised to clarify the slab th'c ness:belowt e.
elevator (see enclosed SK-101). ,e17, / R
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Alberta Rider Elementary School
Structural Checksheet Response
Page 2 of 4
Item 6: Enclosed calculation pages A6 to A8 show the worst case anchor bolt calculations using
PCA document "Strength Design of Anchorage to Concrete". Note: The alternate
foundation plans on S3.4 will not be used.
Item 7: A & B/S7.1: Calculation pages A9 to Al 1 are enclosed. C/S7.1: Calculation page BF-11
has been revised to match the drawings. D&E/S7.1: Calculation page BF-20 is enclosed
(no change).
Item 8: Calculation pages BF-2,3 & 5 are enclosed with clarification of loads and combinations
shown.
Item 9: Sectors A & B were designed to be seismically separated. The seismic joint has been
continued through the main floor at grid 6 between J & L (see enclosed SK102 & SK103V
Item 10: Calculations A25 to A32 enclosed. etails 25/S6.2, 3/S6.3 and 6/S6.8 have been revised
accordingly.
Item 11: Sheet S3.4 will not be used. The detail is incorrect. The anchor bolts are intended to be
spaced at 3'-0" on center for the full length of the angle.
Item 12: The wall above the library doors spans horizontal to the pilasters at grids 5 & 7 (original
calculation page W19). The calculation for the door jamb is enclosed (see page Al2). Per
the structural notes, the cells at each jamb will have (2) #5 vertical.
Item 13: Calculation pages A15 to A18 are enclosed.
Item 14: Calculation page A13 is enclosed. Revised detail enclosed.
Item 15: Revised detail enclosed.
Item 16: Revised detail enclosed, the connections to the column are located at 4'-0" on center
vertically.
Item 17: The calculation for pilasters in details 21 & 22 on S6.1 is on page W19 of the original
calculations. For architectural reasons these pilasters are now larger than required by
design. Calculations for 27 & 29/S6.1 are shown on pages A19 to A24 (enclosed). Detail
29a has been revised accordingly. Pilaster 28/S6.1 has the same loading as 29b/S6.1 but
is larger for architectural reasons.
Item 18: Revised details enclosed
Item 19: Revised details enclosed.
AFCEIVED
Item 20: Revised details enclosed. K:'4
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Item 21: Revised details enclosed.
C CY OF 71C
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Item 22: All outriggers are 3 x 3 tubes. The 3 inch channels are blocking memb`'drs4 betWd-dn''tu6es.
Alberta Rider Elementary School
Structural Checksheet Response
Page 3 of 4
Item 23: Calculation page A14 is enclosed.
Item 24: Revised detail enclosed.
Item 25: Detail 3/S6.9 has been revised to clarify the welding requirements. This connection
supports only the self-weight of the tube.
n y -- Item 26: See enclosed calculation sheet A4 and A5.
Item 27: See enclosed calculations RF-16 to RF-18. Details as shown on sheet S3.3w from Grids A
to C and Grids 6 and 7 show framing and attachments.
1 `'Item 28: See enclosed calculation sheet RF-18. See SK-5 for plan revisions.
V
4/Item 29: Due to roof framing revisions, RB-16 was not used see revised RF-2 and RF-8.
Item 30: See revised calculations sheet RF-5. W21X57 is adequate.
`'Item31: See revised calculation sheet RF-6.
eltem 32: See revised calculation sheet RF-7.
erftem 33: See revised calculation sheet RF-9.
Item 34: See revised calculation sheet RF-9 and added RB-23 shown on added calculation sheet
J� RF-17.
Uv' Item 35: See revised calculation sheet RF-10.
Item 36: See revised calculation sheet RF-11.
Item 37: See revised calculation sheet RF-15.
)i",Item 38: FJ-1 calculation shown on FF-3 is correct. A portion of the library framing was incorrectly
labeled as FJ-1 on sheet FF-1. See enclosed calculation sheet FF-1
Vitem 39: See enclosed calculation sheet FF-7 see enclosed S 4 or plan revisions.
dAlItem 40: Reference plan check item #4.
Vltem 41: See revised calculation sheet FF-4:
fem 42: See revised calculation sheet FF-5
C I Vey g3
dv Item 43: See enclosed calculation sheet FF-7.
Item 44: See revised calculation sheets FF-5 and 6.
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dj4em 45: See revised calculation sheet FF-6. BUILDiNGib,F,c
Alberta Rider Elementary School
Structural Checksheet Response
Page 4 of 4
Items #46 thru 54 will be completed per code and city requirements.
Please call if you have any questions.
Sincerely,
WDY, INC.
a1711/":4,-41'
Douglas E. Paola, P.E., S.E.
Enclosure
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