Section & materials

Design type

Section shape

Geometry mm

Web width, b_w

Overall depth, D

Effective flange width, b_f

Flange thickness, D_f

Clear cover to stirrup

Materials MPa

Concrete strength, f′_c

Concrete at stressing, f′_ci

Rebar yield strength, f_sy

Fitment yield strength MPa

Maximum aggregate size mm

Design actions at this section

Ultimate moment, M* kNm

Ultimate shear, V* kN

Ultimate torsion, T* kNm

External axial force, N* kN

Negative M: top tension; M ≥ 0: bottom tension. Positive N: compression. External N excludes prestress. V and T are checked by magnitude.

Service actions kNm

Service moment

Service external axial force kN

Design moment at transfer

External axial force at transfer kN

Crack control

Selected crack limit mm

Effective creep coefficient

Final shrinkage strain με

Crack width is calculated to AS 3600:2018 clause 8.6.2.3 from the short-term cracked section. Creep and shrinkage enter the mean-strain equation.

Reinforcement & PT

Longitudinal bars

Top main reinforcement

LayerNumberBar, mmClear gap, mm

Top 1Cover

Additional top flange bars total in both wings

Bottom main reinforcement

LayerNumberBar, mmClear gap, mm

Bottom 1Cover

Layer 1 is nearest the face. Clear gap is the vertical distance to the preceding layer. Each main layer stays within the web. Flange bars remain one row at the top layer 1 level, using its diameter.

Shear & torsion links

Stirrup diameter mm

Number of legs

Stirrup spacing mm

Post-tensioning 7-wire ordinary strand

Strand size & grade

Tendon system

Duct condition / material

Tendon effective span mm

Number of tendons

Strands per tendon

Tendon centre from bottom mm

Duct / sheath outside diameter mm

Jacking stress / f_pb %

Loss to transfer % of jacking

Total loss at service % of jacking

Vertical prestress, P_v kN

Positive Pv relieves the magnitude of applied shear; negative Pv increases it. Tendons share one horizontal level. Losses are user inputs.

Ultimate tendon stress

Justified ultimate stress MPa

Section preview

Cross-section · dimensions in mm

Reinforcing bar Tendon / strands Stirrup

Section quantities live

Concrete area, A_g—

Total top steel, A_st—

Bottom steel, A_sb—

Effective steel depth, top / bottom—

Prestressing steel, A_p—

Jacking force, P_jack—

Transfer / effective force—

Effective P/A_g—

Strand properties: AS 3600:2018 Table 3.3.1. Drawing shows strand bundles schematically inside each duct.

Design results

Checking section

Report identification

Project

Member / reference

Calculations by

Flexure

Applied moment, M*: —
Design capacity, φM_uo: —
φ / k_uo: —
Required tension steel: —
Utilisation: —

—

Shear & torsion

Applied shear, V*: —
Applied torsion, T*: —
Design shear capacity: —
Available torsion capacity: —
Combined utilisation: —

—

Serviceability

Service moment: —
Uncracked top / bottom stress: —
Transfer top / bottom stress: —
Calculated crack width / limit: —
Crack-width utilisation: —
Steel for crack width, top / bottom: —

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Detailing

Minimum strength, M_uo,min: —
Horizontal gap / required: —
Vertical gap / required: —
Link spacing limit: —
Longitudinal force check: —
Anchorage / flange interface: Member check

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Section checks to AS 3600:2018 incorporating Amendment 1, using the supplied reference edition. Effective flange width and prestress losses are user inputs. Check anchorage/development, cover for exposure/fire, flange–web interface shear, side-face reinforcement, member deflection, vibration and construction stages separately.