FABR Prestressing Engineering
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Prestressed Structural Design
Upload internal-force diagrams and prestressing drawings to create a calculation-report task.
Upload Design Information
Default Design Parameters
Concrete
Prestressing strand
Area per strand (mm²)
Jacking stress (MPa)
Profile control point
Wobble coefficient κ
Friction coefficient μ
Anchorage loss
Shrinkage and creep loss
Project name
Prestressing internal-force diagrams
Prestressing drawings
Existing calculations or design information
Optional: previous calculations, YJK information, structural notes or design criteria.
Prestressed Beam Inputs
Enter each beam separately. Internal-force values may be extracted from uploaded drawings or entered manually when available.
Prestressed beam 1
Beam ID
Span L (m)
Beam width b (mm)
Beam depth h (mm)
Tendon / strand count n
Left high point a1 (mm)
Midspan low point a2 above soffit (mm)
Right high point a3 (mm)
Support moment M (kN·m)
Midspan moment M (kN·m)
Maximum shear V (kN)
Maximum deflection f (mm)
Tendon Segment Data
Types: parabola, straight, reverse_parabola or deviation. Profile control points must be shared segment boundaries. f is the segment sag in m; σpe is effective tendon stress in MPa. Without segment data, h1–h4 and f are inferred using h1/h2=1/4 and h3/h4=1/4.
Prestressed beam 2
Beam ID
Span L (m)
Beam width b (mm)
Beam depth h (mm)
Tendon / strand count n
Left high point a1 (mm)
Midspan low point a2 above soffit (mm)
Right high point a3 (mm)
Support moment M (kN·m)
Midspan moment M (kN·m)
Maximum shear V (kN)
Maximum deflection f (mm)
Tendon Segment Data
Types: parabola, straight, reverse_parabola or deviation. Profile control points must be shared segment boundaries. f is the segment sag in m; σpe is effective tendon stress in MPa. Without segment data, h1–h4 and f are inferred using h1/h2=1/4 and h3/h4=1/4.
Prestressed beam 3
Beam ID
Span L (m)
Beam width b (mm)
Beam depth h (mm)
Tendon / strand count n
Left high point a1 (mm)
Midspan low point a2 above soffit (mm)
Right high point a3 (mm)
Support moment M (kN·m)
Midspan moment M (kN·m)
Maximum shear V (kN)
Maximum deflection f (mm)
Tendon Segment Data
Types: parabola, straight, reverse_parabola or deviation. Profile control points must be shared segment boundaries. f is the segment sag in m; σpe is effective tendon stress in MPa. Without segment data, h1–h4 and f are inferred using h1/h2=1/4 and h3/h4=1/4.
Prestressed beam 4
Beam ID
Span L (m)
Beam width b (mm)
Beam depth h (mm)
Tendon / strand count n
Left high point a1 (mm)
Midspan low point a2 above soffit (mm)
Right high point a3 (mm)
Support moment M (kN·m)
Midspan moment M (kN·m)
Maximum shear V (kN)
Maximum deflection f (mm)
Tendon Segment Data
Types: parabola, straight, reverse_parabola or deviation. Profile control points must be shared segment boundaries. f is the segment sag in m; σpe is effective tendon stress in MPa. Without segment data, h1–h4 and f are inferred using h1/h2=1/4 and h3/h4=1/4.
Prestressed beam 5
Beam ID
Span L (m)
Beam width b (mm)
Beam depth h (mm)
Tendon / strand count n
Left high point a1 (mm)
Midspan low point a2 above soffit (mm)
Right high point a3 (mm)
Support moment M (kN·m)
Midspan moment M (kN·m)
Maximum shear V (kN)
Maximum deflection f (mm)
Tendon Segment Data
Types: parabola, straight, reverse_parabola or deviation. Profile control points must be shared segment boundaries. f is the segment sag in m; σpe is effective tendon stress in MPa. Without segment data, h1–h4 and f are inferred using h1/h2=1/4 and h3/h4=1/4.
Additional Design Criteria
Create Calculation Report Task
Calculate Equivalent Prestress Loads
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