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: 5 of 8
DESIGN OF CONCRETE BEAMS - Horizontal Steel ACI 318-2002
PROJECT: San Luis
Structure
COMPUTED BY: LLM
INPUT VALUES
fc = 4500 psi b =
fy = 60000 psi D =
Es = 29000 ksi dcvr =
MEMBER I.D.: Short Energy Dissipator Wall
MEMBER LOCATION: Point b
Date: 12/18/2015
12 in
12 in
2 in
Mo = 6.9 k -ft :Unfactored Moment
Mu = 11 k -ft :Ref. ACI 350.9.2.8
for environmental durability factor
CALCULATED VALUES (see ACI 318-02 Section 10.5 for Asmin)
Ec =
3865 ksi
n =
7.5
d =
9.6875 in
B, =
0.83
Pmm(MOR)=
0.0018 Asmin= 0.21 in` (max of 2 eqns)
Pm,n(ACI) =
0.0018
Pmax =
0.0197 ASmax= 2.293 in`
Pbai =
0.0311
Preq =
0.0022 Asreq = 0.26 in
z
Calculated
Quadratic Coefficients
a 39333.33
b -581250
c 146666.7
QTY
SIZE
Area
As pro
2
#4
0.20
0.40
1
#5
0.31
0.31
1
#6
0.44
0.44
1
#7
0.60
0.60
1
#8
0.79
0.79
1
#9
1.00
1.00
1
#10
1.27
1.27
0.07 Pbai
(1.33*ASfeQ) = 0.34 In` ASmin= 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 = 1
CRACK CONTROL
Acomp = 55.50 int
Alt. Design Method
Maximum z Values
Area of bar = 0.31 int
Beam Slab
Clear
Cover = 2.00 in
JI
Aspn, =
0.31 in`
P =
0.3%
Mo =
6.9 k -ft
k =
0.181
j =
0.9397 in
fs =
29.3 ksi
S =
12 in
Smax =
13 in
Use #5@12 in 12 inch deep beam.
CRACK CONTROL
Acomp = 55.50 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
148.0
ACI 3501
148.0
(Normal: pH<5, Soluble sulfates<1000 ppm