2017-02-21_REVISION - M1988112 ‎(2)‎

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 2/21/2017
• Doc Name: Request for Technical Revision
• From: Battle Mountain Resources, Inc.
• To: DRMS
• Type & Sequence: TR34
• Email Name: WHE
• Media Type: D
• Archive: No

Page: 6 of 10
DESIGN OF CONCRETE BEAMS - Horizontal Steel ACI 318-2002
PROJECT: San Luis
Structure
COMPUTED BY: LLM
INPUT VALUES
f = 4500 psi b =
fy = 60000 psi D =
Es = 29000 ksi dcvr =
MEMBER I.D.: Tall Energy Dissipator Wall
MEMBER LOCATION: Point b
Date: 12/18/2015
12 in
12 in
2 in
Mo = 13.2 k -ft :Unfactored Moment
Mu = 21.1 k -ft :Ref. ACI 350.9.2.8
for environmental durabilitv factor
CALCULATED VALUES (see ACI 318-02 Section 10.5 for Asm;n)
Ec =
3865 ksi
n =
7.5
d =
9.6875 in
B, =
0.83
Pmin(MOR) =
0.0018 Asmin= 0.21 in` (max of 2 eqns)
Pmin(AOI) =
0.0018
Pmax =
0.0197 Asmax= 2.293 in`
Pbai =
0.0311
Preq =
0.0043 Asreq = 0.50 in
z
Calculated
Quadratic Coefficients
a 39333.33
b -581250
c 281333.3
QTY
SIZE
Area
As pro
3
#4
0.20
0.60
2
#5
0.31
0.62
2
#6
0.44
0.88
1
#7
0.60
0.60
1
#8
0.79
0.79
1
#9
1.00
1.00
1
#10
1.27
1.27
0.14 Pbai
(1.33*Asfeq) = 0.67 in` Asm;n= 0.21 in (min of Asmin or 1.33*Asreq)
----------> OK - Use Asreq
REBAR SPACING
ACI 318-02 Crack Control Provisions
INPUT --- > Selected Bar Size #5
Qty of bars used = 2
Calced Area of bar = 0.31 int
Values Clear Cover = 2.00 in
Aspra = 0.62 in`
P = 0.5%
M o = 13.2 k -ft
k = 0.2457
j = 0.9181 in
fs = 28.7 ksi
S = 6 in
Smax = 14 In
Use #5@6 in 12 inch deep beam.
CRACK CONTROL
Acomp = 27.75 int
Alt. Design Method
Maximum z Values
Exp.
Beam Slab
Int.
175 155
Ext.
145 129
Normal Severe
Env/HydI
115 1 95
ACI 318
115.0
ACI 3501
115.0
Normal: pH<5, Soluble sulfates<1000 ppm