Specifications a P2o2o-col(DU), UUI(61 ) COI(0423
STRUCTURAL CALCULATIONS
ALUMINUM GUARDRAILS
PROJECT:
SUMMER CREEK APARTMENTS
13456 Hawks Beard
Tigard, OR 97223
for
IsSd
'1,10 'L0 •
Precision Rail of Oregon
10735 SE Foster Road
Portland, Oregon 97266
,RUCTU,
5 RF9 PROF
��,vcrUq <C*GINo�
18346PE
James G. Pierson, Inc. ,a OREGON so
�Q��eh 19, O\Ne5 '
0
`�p R. 4c3-
Gp�.
�NGlNEE? EXPIRES: 6-3O-21
James G. Pierson, Inc.
Consulting Structural Engineers
610 S.W.ALDER SUITE 918 PORTLANI),OR. 97205
(503)226-1286 FAX 226-3130
August 5,2020
Page 1 of 13
Aluminum Railing Systems
Task: Check aluminum railing system and attachments for conformance to the 2018 IBC using
the 2015 Aluminum Design Manual, 10th edition.
Code Summary
`/Multiple family dwellings (apartments, condos, hotels) and other commercial applications - IBC
is the controlling code
IBC Section 1607.8:
Guardrail & Handrails 200 lbs any direction at top rail or
50 plf load to the top rail in any direction
Guardrail in-fill 50 psf over a 1 ft sq. area (balusters, fillers, glass, cables, etc)
Glazing requires a safety factor of 4
Guardrail Height: ; H42 = 42 in✓
ALUMINUM PROPERTIES
Extruded 6005-T5
;FL = 38 ksi
;Ft5 = 35 ksi
;F'c6 = 35 ksi
;Fshear = 20 ksi
;Fbearing = 56 ksi
;E = 10000 ksi
;Fb1 = F'cy / 1 .65 = 21212.12 psi ;(ASD)
or ;Fb2= Ft./ (1 * 1.95) = 19487.18 psi ;(ASD)
; Fbi = 21212.12 psi
Fb2 = 19487.18 psi
;Fb = min(Fb,,Fb2)
;Fb = 19487.18 psi
Project Job no.
James G. Pierson, Inc. Summer Creek Apartments
Location nato
Consulting Structural Engineers
Tigard, OR 8/5/2020
610 S.W.Alder.Suite 910 Portland,Oregon 97205
TeL(503)226-1256 Fax:(503)226-3130 Chen Sheet no.
Precision Rail of Oregon Page 2 of 13
Aluminum Properties Cont:
Extruded 6063-T6
;Ftt16o63 = 30 ksi
;Fty6o63 = 25 ksi
;F'cy6o63 = 25 ksi
;Fshear6o63 = 17 ksi
;E6o63 = 10100 ksi
;Fb16o6s= F'cy6063 / 1.65 = 15151.52 psi ;(ASD)
or
;Fb26o63= Fte6o63/ (1 * 1.95) = 15384.62 psi ;(ASD)
; Fb16o63 = 15151.52 psi
; Fb26o63 = 15384.62 psi
;Fb6063 = min(Fb16063,Fb26063)
;Fb6o63 = 15151.52 psi
Project Job no.
James G. Pierson, Inc., Summer Creek Apartments
Consulting Structural Engineers Location Date
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 c.licn sheet no
Precision Rail of Oregon Page 3 of 13
CHECK 375 SERIES TOP RAILS FOR LOADING
;L=5 ft;is desired maximum spacing of posts. ;L=5.00 ft
Bending of Top Rail ;M=200 Ibs*L/4=250.00 lb_ft;or
; M=3000.00 lb_in
375 Series Top Rail (SAPA part 31836)
;lx1375TR=0.382 in4
;lx2375TR=0.295 in4
;SVert375TR= lx1375TR/1.382 in=0.28 in3
;Shorz375TR=lx2375TR/0.875 in=0.34 in3
Check for vertical loading direction:
;fb,,ert=M I Svert375TR=10853.40 psi ; < 19,500 psi (for 6005-T5)
,_"Okay" f
Check for horizontal loading condition
;fbhorz=M/Shorz37sTR =8898.31 psi; <19,500 psi
;375 series Deflection;Def37sTR=200 Ibs*L3/(48* E*Ix2375TR)=0.31 in
;L/120=0.50 in ;(max)
375 Series Top Rail okay for 5 ft spacing of posts for vertical or horizontal loading
Project Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers Location ate
Tigard, OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Client Sheet no.
Precision Rail of Oregon Page 4 of 13
CHECK BOTTOM RAILS 1 5/1 6" -�-
Check bottom rails for wind loads or 50 lbs over 1 sq,ft.
;L=5 ft;is desired maximum spacing of posts. ;L=5.00 ft
100 Series Bottom Rail
cz_l
;Ivertloob=0.048 in4
;Ihorzloob=0.104 in4
;Svertloob= Ivertloob/1.0625 in= 0.05 in3
;Shorztoob=Ihorzloob/0.468 in=0.22 in3
50 lbs over 1 sq.ft. Use 50 lb point load at midspan
C_
;M=50 lb*L/4=62.50 lb_ft
100 SERIES BOTTOM RAIL
Check for vertical loading direction:
100 series stress;fbloo=M/Sverttoob = 16601.56 psi
Bottom rails okay for the 50 lb point load
Project Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers Location D81C
Tigard, OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Chem Sbeet no.
Precision Rail of Oregon Page 5 of 13
RAIL CONNECTIONS
The top rail sections either slide over connection blocks or are attached to
the top of the posts. In either case,(2)#10 self-drilling steel screws are
used to make the connections.
The connection blocks are attached to the sides of the vertical posts with
(2)#10 self-drilling steel screws. In most cases,the 200 lb maximum load
is shared by(4)screws but if the load(200 Ibs)is placed at the end of a
rail,it would be supported by just(2)screws.
Maximum shear is each screw ;u=200 lbs/2= 100.00
Allowable shear in each screw:
5.4.3 Screw Shear and Bearing
The shear force on a screw shall not exceed the least of:
I) 2 F,*1 D r1/n,,. (Eq.5.4.3-1)
If the screw is countersunk, one-half the depth of the
countersink shall he deducted from r.
2) 2F„=Dt21a„ (Eq. 5.4.3-2)
3) 4.2(r?1DF F„,2ht,,for r,5 r, (Eq. 5.4.3-3)
4) P„,/(1.25 ax) (Eq.5.4.3-4)
; Ftuscrew=38000 psi
;dscrew=0.19 in ;#10 screw
;nu= 1.95 ;asd factor
;nu=3 ;factor of safety
=0.1 in ;thickness bottom rail
;t2=0.1 in ;thickness post
;Pns = 1526 lbs ;ESR-3332 report
;1) ;2*Ftuscrew*dscrew*tt I nu=740.51 lbs
;2) ;2*Ftuscrew*dscrew 12 I nu=740.51 lbs
;3) ;4.2*(t23*dscrow)'5*Ftuscrew/nu=733.31 lbs
;4) ;Pns/(1.25*nu)=406.93 lbs
Okay
#10 screws are okay to attach top rail to posts
Bottom rail connection similar but 50 lb design load. #10 screws okay by
inspection
Project Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers Location earn
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Chen Sheet no.
Precision Rail of Oregon Page 6 of 13
Posts
2 3/8" x 2 3/8" Posts
All of the railing systems use the R Series Post
R Series Post (SAPA part 36430)
Posts for this project are mounted a maximum distance of 7"below
decking for an effective post height;H48=49 in
=0.935 in4
;Ix2=0.935 in4
;SA =1.1/1.188 in= 0.79 in3
;Sx2=1,2/1.188 in=0.79 in3
For 49"tall posts(fascia mounted), 5'0"max spacing ;L=5.0 ft
Per IBC ;M3=200 Ibs*(H48) =9800.00 lb_in
Per IBC ;M4=50 lbs/ft*L*(H48) =12250.00 lb_in
Balcony Posts—49"height
;Fb3=M3/S.,=12451.76 psi ;or;Fig=M4/Sx,=15564.71 psi
Allowable; Fb=19.49 ksi
Deflection Check
;D3=200lbs*(H48)3/(3*E*Ix2)=0.84in
;D4=50lbs/ft*L*(H48)3/(3*E*1a)=1.05in
;Doll=49 in /60=0.82 in ;(similar to buiding deflection limits IBC
Table 1604.3 for other components of the building)
Project Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers Location Date
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Pax:(503)226-3130 Client Sheet no.
Precision Rail of Oregon Page 7 of 13
POSTS - SHEAR
Check shear in post walls
Circumference of resisting area for screw pull-thru
;Cserew=0.2 in*pi=0.63 in
Post wall thickness;ti =0.10 in; (13503)
;Areal =Crew*t1 =0.06 in3
;V=Areal*Fshear/1.65=761.60 lbs ;> 100 lbs
Check Posts for Shear
;fv=300 lbs/(2*2.375 in*ti)=0.63 ksi ; not an issue
CHECK RAIL SPLICES
Check hat channel (SAPA 25877)rail splices. These members,when
used,are located at rail splices over posts
;Mhat=200 lbs*6 in=1200.00 lb_in
2.To join a straight connection,butt joint over the
Flat Channel (SAPA part 25877) center of a post, Reinforce the joint with 8 410 x
3/4"screws,fastened through pre-drilled holes,
;sverthat=0.0736 in3 to a splice centered between the rails. Attach
;Shorzhat=0.149 in3 top rail to the post with 4#8 x 1/2"screws.
;Fbvert=Mhat/Sverthat=16304.35 psi
;Fbhorz=Mhat/Shorzhat=8053.69 psi ui • -•
' trt�utrmrw
,: j 3 j .artswnalwce
;Fty-/1.65 = 21212.12psi
t. = F r►te Pat WS
;Fb = 19487.18 psi
soc
Hat channels are okay . ~ . ?
Project
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers L s"o"
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Client Shoot no.
Precision Rail of Oregon Page 8 of 13
POST MOUNTING BRACKETS
Check screws:
Fascia Mount Diagram
;vscrew=300 lbs*(H48)/(4.5 in*2)=1633.33 lbs
Allowable Shear screw; Vscrewanow= 120 ksi*.2*.7=16.80 ksi ! .
Shear area required ;vscrew I Vscrewallow=0.10 in2
Use 5/16"tll x'/2"long Torx Drive Flate Head self drilling screws
Vertical load is shared between(4)screws or;300 lbs/4=75.00 lbs; each
—okay
Check Bending in Bracket
;fbXbracket=300 lbs*(H48)/(5.825 in4/1.5 in)=3785.41 psi;out-of-plane
direction
;fbybraoket=300 lbs*(Hag)/(7.204 in4/3 in)=6121.60 psi;in-plane of deck
Fascia Bracket okay for loads.
P,ojecl Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers Location Date
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Client Sheet no.
Precision Rail of Oregon Page 9 of 13
PICKET RAILING
Picket Railing systems use the Series 200 top rail,standard R series posts,and 100 series bottom rail
et .K S 0,1191S
(`♦�'I r/
PAD W(509 MAPr1
tM wit 4001n MOO)
•
TOP Mt mil FMSn&WI
.,n%.n SM 95
/ v WOO WaO WV"
t1n ALUM:
IN'90.PrSt(iW1 MA NI
K1
pDt INroln NUM)
II0%.75 S5 M 96
•
MIL a1101K1714
♦ ROM(W IWI Yule
Y PLUM
a64fu�i
MU".ft SW 0.511.51)131tX
/ 'I
tpn01%%%Pxxri
9IGR 005945 Y11.11
5 q
• /
.onolw Nmsn won
st ow non
Ite%1'SEM 96
Check Pickets
ti
5/8" SQUARE PICKET
Design Loads-Infill: 50 lbs over 1 sq.ft design load Area - 0.115 in-2
Perimeter - 2.183 in
min 2 pickets resist that load so use 25 lb point load for eentroid,*th respect to Sketch origin(in)
x - o
design y - o
;M picket=25 lbs*48 in/4=300.00 lb_in Inertia with respect to Sketch Orgin(in)-
Inertia Tensor(in"4)
;'wicket=0.006 InA4 hex •• 0.006
Icy0
ly% - 0
lyy - 0.006
;Sxpicket= Ixpicket/0.3125 in=0.02 inA3
Polar Moment of Inertia - 0.013 in-•
Fbpicket= Mpicket/Sxpicket=15625.00 psi "-
Area Moments of Inertia with respect to Principal Axes(in 4):
It, - 0.006
ly - 0.006
Polar Moment of Inertia - 0.013 5n"4
Pickets okay for 48" height Rotation Angle from projected Sketch Origin to Principal Ares(degrees).
About z axis - 0
Radii of Gyration with respect to Principal A%es(in):
R1 - 0.236
R2 • 0 236
Projut Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers Location Dale
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Client Sheet no.
Precision Rail of Oregon Page 10 of 13
FASCIA BRACKET INTO BLOCKING
(Detail 1/A6)
Max;L=5ft
;H= 42 in +4 in=46.000 in
Per IBC
;Mi =200 lbs*(H) =9200.000 lb_in
;M2=50 plf*L*(H) = 11500.000 lb_in ;(50p1f controls)
;M2irfd=M2*1.6= 18400.000 lb_in ;(LRFD)
;V=300Ib; (ASD)
;Vlo-d=V* 1.6=480.000 lb;(LRFD)
Anchor Tension;AT=M2/4.5 in=2555.556 lb; (ASD)
2 anchors per side ;Ts=AT/2=1277.778 lb; (ASD)
;Tatra=Ts*1.6=2044.444 lb;(LRFD)
Try 3/8"diameter lag bolts and assume DF,
;Tallow=305 lb* 1.6=488.000 lb;per inch embedment
Embedment requirement is: ;T=Ts/Tallow =2.618;inches
Use(4)3/8"x 5"fully threaded SS lag screws at each post location.
Secure blocking against rotation with 4 Simpson DTT2Z anchors or SDS screws on each side.
MIK W P C$ET VINYL 8
KO SEkfEB F 8
fi`FASCIA.moon ATTACHFO VN'141
>V :NM'FULLY THREADED LAG SCREnS
F......w.r.."............-......_____....,ip ,
.ix OR 12;2X 6LOCFJNG AND-F 1E'0
K+.GB to f HE,K015I S a!0"21
Ensure fasteners are ANi>onsCa SOS SCREthiSINTO
not within 1-1/2" of ENO ANDA3S•5
top of bottom of trim
or framing members.
Project Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers L°`a"°° Date
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205 •
Tel:(503)226-1286 Paz:(503)226-3130 Churl Shea no.
Precision Rail of Oregon Page 11 of 13
FASCIA BRACKET INTO BLOCKING AT CONCRETE DECK
(Detail 1/A7)
Max;L=5 ft
;H=42 in+7 in=49.000 in
- Per IBC
;M1 =200 Ibs*(H) =9800.000 lb_in
;M2=50 plf*L*(H) =12250.000 lb_in ; (50p1f controls)
;M2irid=M2* 1.6=19600.000 lb_in ;(LRFD)
;V=300Ib; (ASD)
;Vita=V* 1.6=480.000 lb;(LRFD)
Anchor Tension;AT=M2/4.5 in=2722.222 lb; (ASD)
2 anchors per side ;Ts=AT/2= 1361.111 lb; (ASD)
;Tsifrd=Ts* 1.6=2177.778 lb;(LRFD)
Try 3/8"diameter lag bolts and assume DF,
;Tallow=305 lb* 1.6=488.000 lb; per inch embedment
Embedment requirement is: ;T=Ts/Tallow =2.789 ;inches
Use(4)3/8"x 5"fully threaded SS lag screws at each post location.
Secure blocking against rotation with 4 Simpson DTT2Z anchors or SDS screws on each side.
BRt00 Aft PICKET VINYL&
t00 SERIES RCB
4X OR(2)2X BLOCKING ANCHORED
BACK TO THE JOISTS Wl DTT2Z
♦ ;.4 ANCHORS OR SDS SCREWS INTO
a►• 4 END AND A35'S
- 1 a.
IIy / 6"FASCIA BRACKET ATTACHED IN/(4)
/ 4"X5"FULLY THREADED LAG SCREWS.
I ,
/`/
It
Ensure fasteners are
not within 1-1/2" of
top of bottom of trim
or framing members.
Project Job no.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers Lo"don Dam
Tigard,OR 8/5/2020
610 S.W.Alder,Suite 918 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Client Sheet no.
Precision Rail of Oregon Page 12 of 13
POST AT STAIRS
(Detail 1/A8)
Max;L=5 ft; BR100 WI PICKET VINYL&
100 SERIES RCB
;H=36in
Per IBC
3'X STAIR STRINGER BY OTHERS
•
;M1 =200 lbs*(H) =7200.000 lb_in 1/,'X3X8ANGLED BASE PLATE
;M2=50 plf*L*(H) =9000.000 lb_in ;(50p1f controls) ATTACHED W;(4)C'X6'FULLY
THREADED LAG SCREWS.
Anchor Tension;AT=M2/2 in=4500.000 lb ,o 0
1/.-
2 anchors per side ;Ts=AT/2=2250.000 lb ;(ASD) TYP
Try 3/8"diameter lag bolts and assume DF,
;Tallow=305 lb* 1.6=488.000 lb; per inch embedment
Embedment requirement is: ;T=Ts/Tallow=4.611 ;inchesUSE(4)3/8"diameter fully threaded SS lag screws with 6.15 in min embedment at each post location.
3i7'
H
.� V.I.F.
•
J
cn
en
Project John°.
James G. Pierson, Inc. Summer Creek Apartments
Consulting Structural Engineers t°mot"° Date
Tigard, OR 815/2020
610 S.W.Alder,Sunk'l18 Portland,Oregon 97205
Tel:(503)226-1286 Fax:(503)226-3130 Client Sheet no.
Precision Rail of Oregon Page 13 0113