Design Tools
Flexural Design of Isolated Footing
SQUARE FOOTING DESIGN · ACI 318-19
REINFORCED CONCRETE · FLEXURE · SHEAR · REBAR
Design Summary
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Footing Diagram — Plan & Section View
Detailed Calculation — Engineering Report Format
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Engineering Report — Password Protected
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Flexural strengthening of an interior reinforced concrete beam with FRP
ACI Notation: df = FRP soffit depth | ds = steel effective depth
P
Project Information
1
Beam Geometry
Width of beam, b
in
FRP Soffit Depth (Total Height), df = overall beam height; FRP bonded to soffit
in
Steel Effective Depth, ds = dist. from top fiber to steel centroid
in
Steel area, As
in²
2
Concrete & Steel Properties
Concrete strength, f'c
psi
Steel yield strength, fy
psi
3
CFRP System Properties
Ultimate tensile strength, f*fu
ksi
Elastic modulus, Ef
ksi
Rupture strain, ε*fu
in/in
No. of CFRP layers, ni
nos
Width of CFRP sheet, wf
in
Thickness per ply, tf
in
4
Applied Loading
Dead load moment, MDL
k-ft
Live load moment, MLL
k-ft
Factored design moment, Mu
k-ft
Assumed neutral axis depth, c (iterate until convergence)
in
Design Summary
—
Design Moment, Mu
—k-ft
Existing Capacity, φMn,exist
—k-ft
Retrofitted Capacity, φMn
—k-ft
—
Service Limit (1.1DL+0.75LL)
—k-ft
—
Steel Service Stress, fs,s
—ksi
—
FRP Creep Stress, ff,s
—ksi
—
CFRP Debond Strain, εfd
—
in/in
Development Length, Ldf
—in
📐 Beam Cross-Section & Strain Distribution
Concrete
Steel Bars (at ds)
CFRP Layer (at df)
Neutral Axis
Detailed Design Report — ACI 440.2R-17 (Cross-Checked vs. Example 16.3)
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