Report (47) / (/ 9O(2 -
MILLER Art [1,75-- 540 "/
• CONSULTING
May27, 2009 ENGINEERS
Bill Bunch
Interstate Roofing
15065 SW 74th Avenue
Portland, Oregon 97224
Subject: Existing Loft Capacity Analysis
15065 SW 74th Ave.,Portland, Oregon
MCE Proposal Number: 090388
Dear Mr. Bunch,
Miller Consulting Engineers, Inc. has evaluated the existing storage loft located at
Interstate Roofing's headquarters in Portland, OR. The loft consists of 2x12 floor joists
at 16" o.c. with a maximum span of 17 ft. The joists bear on a 2x4 stud wall on one end
and a cmu wall on the other. The maximum allowable live load was calculated to be 80
psf. We have attached supporting calculations for reference. Please let me know if you
have additional questions or comments.
Respectfully, _.
S,t R u c r u�`
Miller Consulting Engineers, Inc. �E� PAric
44.4 �N4GINF.
402.s.0"��� 16655PE`
Kevin M. McCormick, S.E.
OREGOi`-
Managing Principal 9tiG
le qRy
EXPIRES: 12-31- Zo�c7 -,
9570 SW Barbur Blvd., Suite 100 Portland, Oregon 97219-5412
Phone (503) 246-1250 Fax (503) 246-1395 www.millerengrs.com
American Consulting 6.44 Engineers Council
RECEWED
_ NOV 13 2012
MILLER GITY OFTIGIARD
CONSULTING MUMOO*GDWSION
ENGINEERS vvvv��
STRUCTURAL CALCULATIONS
Existing Loft Capacity Analysis
15065 SW 74th Ave., Portland, Oregon
Interstate Roofing
May 27, 2009
Project No. 090388
3 pages
Principal Checked: Kr4i''1
THESE CAL a Nk'': VOID IF SEAL
IN /
a
16655PE 9
OREGON
177 9yG1HY 15 2�4`vi
N
_ 4 CoP
AND SIG AT I-'._ • Ni NOT ORIGINAL
EXPIRES: 12-31-Zoc o
*** LIMITATIONS ***
ENGINEER WAS RETAINED IN A LIMITED CAPACITY FOR THIS PROJECT.
DESIGN IS BASED UPON INFORMATION PROVIDED BY THE CLIENT,
WHO IS SOLELY RESPONSIBLE FOR ACCURACY OF SAME.
NO RESPONSIBILITY AND /OR LIABILITY IS ASSUMED BY,
OR IS TO BE ASSIGNED TO THE ENGINEER FOR ITEMS
BEYOND THAT SHOWN ON THESE SHEETS.
9570 SW BARBUR, #100
PORTLAND, OR 97219
PHONE (503) 246-1250
FAX (503) 246-1395
9570 SW Barbur Blvd., Suite 100 Portland, Oregon 97219-5412
Phone (503) 246-1250 Fax (503) 246-1395 www.millerengrs.com
American Consulting j Engineers Council
Building Code: 2006 International Building Code as amended by the state of Oregon
Soils Report: No Soils Report by: N/A Dated: N/A
Soil Bearing: 1500 PSF Retaining Walls: No
Equivalent Fluid Pressure(active): N/A PCF Passive bearing: N/A PCF Friction: N/A
Structural System: Building Structure
Vertical System: Wood framed Construction Lateral Sys: N/A N/A
Element Roof Floor Corridor Garage
Load Type Dead Dead Dead Dead
• Basic Design Value(PSF) 8 15 15 10
Loads: Load Type Snow Floor Live Condor Live Deck Live
Value(PSF) 25 40 100 40
Deflection Criteria U240 L/360 L/360 U360
Lateral Design Parameters:
Wind Design: N/A N/A MPH
Exposure N/A
Importance Factors lw= 1.00 le= 1.00 Is= 1.00 II= 1.00 Occupancy Cat: II
(wind) (seismic) (snow) (ice)
(Iw=1.0 with wind concurrent with ice)
Seismic Design
N/A
Design Summary:
The following calculations are to determine the maximum allowable live load on an existing loft at the Interstate Roofing building located in Portland,OR.
gaPs 9570 SW Barbur Blvd. Project Name: Existing Loft Capacity Analysis Project#: 090388
Suite One Hundred
Portland,OR 97219 Location: 15065 SW 74th Ave.,Portland,Oregon
IOW
• MILLER (503)246-1250 Client: Interstate Roofing
Consulting FAX:246-1395
Engineers BY: EMH Ck'd: +L � Date: 05/27/09 Page 1 of 3
EXISTING Coat CPcPPTy
wz.
2'I1 4(L AT IC, O.C. W
PER 19$'1- /ABC : Fb= /63,5o ps; I7-
(o,0 i✓' c7 -
ST/u$S�S
E= h-00 Ks,
/yak= /65o psi (31 Gil;v17)= 1/350 k-16 70-1 Kr
12 10 USC. 2xu AT ILS o.C. (E)CfritA wAt-L
45(Ico -c) = 106916
/.5
( ) 2
isW = 9aps�E
51RGItCck V 90Ie-) (II.') = /o2S 16 d-- /c q lb oK
0.-41/5% //2�3 vk
STuI' GNEGK
5 > PG. 3 Fbrz. cALLs.
kbLDAO
P r - = 3ps�
'y PWWoob = 35( 31 a. 5
90 s� -8 = B PSC AltowA-Rit $AY $o psc
MAX. Livt; LOAD o/1/ aoVSc-
9570 SW Barbur Blvd Existing Loft Capacity Analysis 090388
Suite One Hundred Project Name Project #
Portland, OR 97219-5412 Location 15065 SW 7th Ave.,Portland,Oregon
MILLER Client Interstate Roofing
CONSULTING (503)246-1250
EMH 5/21/09 of 3
ENGINEERS Fax: 246-1395 By Ck'd 11-4-� Date Page
s
Reduction Rending Axial,Fc E Emin Fee,= 7655 psi
• Stud Copyright O 2009 Miller Consulting Engineers,Inc. CD 1.00 1.00 Fce2= 651 psi
Mark Typ Stud Material: DIMENSIONAL LUMBER Rb, 6.2
F='�'-1 Grade: DF/L No.2 or Better C, 1.15 Rby 4.7
Y 11-r size=2 x 4
C. 1.00 1.00. 1.00 1.00 Fbe, 18599 psi
d2�'= e'' d,= _1.50 in CF 1.50 1.15 Fbey 33066 psi
e02 d2= -..3.50 in CM 1.00 1.00 1.00 1.00 KM 2300
z ./ A= -5.25 int C, 1.00 1.00 1.00 1.00 KT 0.59
--1 S,= 3.06 in3 CT 1.03 Fb, 2846 psi
• Height= 8 ft lu,= 1 ft Sy= 3.06 in3 Cv 1.00 Fby 2846 psi
Spacing= 16 in o.c. 1u2= 8 ft Le,= 2.06 ft C„ 0.99 Fbe,/Fb," 7
w„= 1170 pIf Md,= 54 ft-lbs Le2=, 14.72 ft C11 1.00 Fbey/Fby 12
p= 5 psi Ke,= 1 Fb,= 1650 psi Cp 0.48 Fc' 1150 psi
w,,= 8.7 pif Ke2= 1 Fby= 1650 psi Cfu 1.10 Fb,' 2846 psi
A„„,,,=L/ 240 le,= 1.00 ft Ex= 1700 ksi CE 1.00 1.00 1.00 1.00 Fby 3131 psi
Ie2= 8.00 ft Ey= 1700 ksi CE=Exterior wet use of SCL lumber Fc' 550 psi
le,/d,= 8.00 Ex„„„= 580 ksi EX 1700 psi
le2/d2= 27.43 Ey„;,= 580 ksi Ey' 1700 psi
A= 0.07 in Fc= 1000 psi Ex„,,,' 595994 psi
L/1371 c= 0.8 Ey„,,,; 595994 psi
FbX=(Fbx")(CL)(Cfu)=2,846 psi I,= 5.36 in4 Material DIMENSIONAL.UMBER w
Fby=(Fby")(CL)(Cfu)=3,131 psi ly= 0.98 in4 Grade DFti Na.2 or Better V
Fc'=(Fc)(Cd)(Cm)(Ct)(Cf)(Ci)(Cp)=550 psi Load Duration,CD TEN TEARS 1.0 occuvuvE V
E'=(E)(Ct)(Cm)(Ci)=1,700 ksi
Emin'=(Emin)(Ct)(Cm)(Ci)(CT)=596 ksi Temperature Factor,C, T<<1000F w
ibx=212 psi<FbX=2,846 psi Bending Capacity=7.4% Wet Service Factor,Ca M Muni E can.LESS rim 19% w
fby=0 psi<Fby=3,131 psi Incising Factor,CI MEMBER IS NOT INCISED V
fc=297 psi<Fc'=550 psi Axial Capacity=54.0% Repetitive Factor Cr MEMBER IS REPETITIVE V
Built up Member No w
Combined Axial Compression and Bending Combined Capacity=36.9% Member 2x4 w
Equation 3.9-3;2005 NDS page 20
Max Deft=0.070 inches=L/ 1,371 Deft.Capacity=17.5% 2 x 4,DIMENSIONAL LUMBER
DFIL No.2 or Better at 16"o.c.
9570 SW Barbur Blvd Existing Loft Capacity Analysis
Suite One Hundred Project Name Project # 090388 AS
_ Portland, OR 97219-5412 Location 15065 SW 7th Ave.,Portland,Oregon
MILLER Client Interstate Roofing
CONSULTING (503)246-1250
ENGINEERS Fax: 246-1395 By EMH Ck'd It rt Date 5/21/09 Page Z of ,3 1