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PROJECT :
PAGE :
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 CLIENT :
DESIGN BY :
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JOB NO. :
DATE :
REVIEW BY :
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Two Pads with Grade Beam Design Based on ACI 318-14 & AISC 360-10/16
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INPUT DATA & DESIGN SUMMARY
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CONCRETE STRENGTH
fc' =4ksi
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REBAR YIELD STRESS
fy =60ksi< == Tip :
This kind Grade Beam design is only for small lateral loads. If not work, please use MRF-GradeBeam.xls or BraceGradeBeam.xls on this web site,
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SQUARE PAD SIZE
B =8ft
since total soil reaction MUST be within the footing at load combination of (0.9DL + 1.0E), which always governing the grade beam size.
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T =16in
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GRADE BEAM SIZE
SteelW18X65
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Outside Concrete Width
W =36in
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Outside Concrete Depth
D =36in
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COLUMN DISTANCE
L =22ft
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GRADE BEAM EXTENSION
Le =5ft
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FRAME AXIAL LOADS, ASD
PD,1 =25kipsPD,2 =25kips
(Dead Load)
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PL,1 =15kipsPL,2 =15kips
(Live Load)
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GRAVITY AXIAL LOADS, ASD
PE,1 =-30kipsPE,2 =30kips
(Seismic Load)
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VE,1 =50kipsVE,2 =30kips
(Seismic Load)
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SEISMIC LOADS, ASD
ME,1 =50ft-kipsME,2 =50ft-kips
(Seismic Load)
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ALLOW SOIL PRESSURE
Qa =2,5ksf
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PAD REINFORCING
8#6
@ 12 o.c., Each Way, Bottom.
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THE GRADE BEAM DESIGN IS ADEQUATE.
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ANALYSIS
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CHECK OVERTURNING AT CENTER BOTTOM OF PAD 2 (IBC 1605.2.1, 1808.3.1, & ASCE 7 12.13.4)
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MO =
ME,1 + ME,2 + (VE,1+VE,2)(D+T) - PE,1L
=1106,7ft-kips
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MR =(PD,1 + gconc B2T) L + 0.5gconc & steel(L + 2Le) L D W =1322,7>
0.75 x 1.4 MO / (0.9) =
1291ft-kips
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[Satisfactory]
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CHECK SOIL BEARING CAPACITY
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1,57
ksf, (net pressure)
<4/3 Qa
[Satisfactory]
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wheregconc =0.15 kcf
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gsoil =0.11 kcf
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CHECK PAD FLEXURAL REINFORCING
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0,0020<
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rprovd =0,0030
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whered =12,25in
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Qu,max = 1.5 Qmax =
2,36
ksf, factor 1.5 for SD
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Mu = 0.125 (B-W)2 B Qu,max =
129ft-kips
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rmax =0,0206
(ACI 318 22.2.2 & 7.3.3.1)
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rmin =0,0018
(ACI 318 7.6.1.1)
[Satisfactory]
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(cont'd)
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CHECK PAD ONE WAY SHEAR CAPACITY
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Vu<fVn
[Satisfactory]
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where
Vu = 0.5 (B - W) B Qu,max - d B Qu,max =
27,9kips
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fVn = f 2 d B (fc')0.5 =
111,6kips
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f = 0,75
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CHECK STEEL GB FLEXURAL CAPACITY
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A ZxFyWb
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19,1133501,67
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(AISC 360 F1)
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Mallowable = Zx Fy / Wb =
331,8ft-kips
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(cont'd)
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>
Max ( Mtop , Mbot )
[Satisfactory]
(AISC 360 F1)
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329ft-kips
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168ft-kips
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where1,97
ksf, (full ASD pressure)
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QMIN =0,36
ksf, (full ASD pressure)
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LICENSE NUMBER: Package License Including New Software Based on ASCE 41-17, ASCE 7-16, AISC 360/341/358-16
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www.Engineering-International.com
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