Project No.
18-244
DESIGN OF FOOTING PEDESTAL REF: ACI CODE 318-08
Material Properties: f'c 3000psi
fy 60000psi
Strength Reduction Factor
ϕ 0.65
for Tied Column
Section Properties Length and Width of Pedestal
LPedestal 24in
Gross Concrete Area
Ag LPedestal BPedestal 576 in
Re-bar Specification
BPedestal 24in 2
Rebar #
Dia of Rebar,
ϕrebar
Area of Rebar,
Arebar
Rebar # 8 π
in 1 in 0.785 in
2
Number of Steel Rebar
Nrebar 8
Total Area of Steel
Ast Arebar Nrebar 6.283 in
2
ϕrebar 4
2
Pedestal Capacity Check
Maximum Allowable Load on Pedestal
ϕPn 0.8ϕ 0.85 f'c Ag Ast f y Ast 951.48 kip
Maximum Column Load on Pedestal
PMax 46kip
Pedestal Section
"OK"
if ϕPn PMax
"Not OK"
Pedestal Section "OK"
if ϕPn PMax
Ref: Footing Gravity Load Calculations
Reinforcement Ratio Check Provided Area of Steel
Ast 6.283 in
Gross Area of Concrete
Ag 576 in
Provided Reinforcement Ratio
ρ
Reinforcement Ratio
"OK"
2
2
Ast 100 Ag
1.091
if ρ 1
"Not OK"
if ρ 1
Reinforcement Ratio "OK"
Calculation For Ties Selected Tie Reinforcement
Tie #
Dia of Rebar,
ϕTie
Area of Rebar,
ATie
Tie # 8 π
in 0.375 in 2
ϕTie 0.11 in 4
2
Spacing of Tie will be the minimum of the followings 16 Times Longitudinal Bar Diameter 48 Times Tie Bar Diameter Least Cross Sectional Dimension of Column/Pedestal 6 in So, Selected Tie Spacing
STie min 16ϕrebar 48ϕTie LPedestal BPedestal 6in 6 in
Summary Length of Pedestal
LPedestal 24 in
Width of Pedestal
BPedestal 24 in
Logitudinal Rebar
Nrebar 8
Dia of Rebar
Rebar # 8
Tie Bar Spacing
STie 6 in
Dia of Tie
Tie # 3
Color Legends Input Data Special Case Input Check Modify Value Based on Calculation Reference