NZS 3101 & C5 — RC Section

Saved Profiles

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Section Inputs

Designation

Width, b mm

Depth, h mm

Clear cover mm

Stirrup dia mm

Tie dia mm

Bending Axis

Materials

Concrete, f′c MPa

Max Agg, dg mm

Longit, fy MPa

Steel Es MPa

Longitudinal reinforcement

ParametricManual

TOP STEEL

Lyrs

Bars

Dia

BOTTOM STEEL

Lyrs

Bars

Dia

WEB / SIDE

Lyrs

Bars

Dia

Spacing, Sv mm

Layer	d from top	Bars	Dia. / List

Flexural Assessment

Strength factor, φ

Target Axial N* kN

View Mechanics

Shear Assessment

NZS 3101C5-2025

Strength factor, φv

Transverse Reinforcement

Tie Yield, fyt MPa

Internal Crossties // Y

Internal Crossties // X

Spacing, s mm

Target Demands

Axial N* kN

V* // Y (Depth) kN

V* // X (Width) kN

Shear Capacity // Y-Axis (Depth)

CONCRETE, Vc

STEEL, V_s

CAPACITY

Shear Capacity // X-Axis (Width)

CONCRETE, Vc

STEEL, V_s

CAPACITY

Equilibrium Mechanics

N* (kN):

View:

P–M Interaction Diagram

Moment-Curvature

N* (kN):

Seismic Member Parameters

Axial Load N* kN

Shear Span, Ls mm

NZSEE C5 Mechanics (Probable Shear Strength). Ls defines the M/V aspect ratio.

Failure Mode Assessment

Run analysis to evaluate...

Force-Displacement & Shear Degradation

T-Beam Flexure · NZS 3101

Web width b, depth h (incl. flange), f'c, E_s, φ and the web reinforcement come from the main Section Inputs / Flexure tab. Total depth h is the full section height including the flange. Flange bars sit in the overhangs only and the count is per flange (e.g. 3 → 3 in each flange). Layer 1 is at the cover below the top; layer 2 (if used) is at the same cover above the flange soffit. Major-axis (X-X) flexure only; flange effective width is left to the user.

Flanges

Flange thickness, t_f mm

Flange width each side, b_f mm

Cover to flange reo, from top mm

Flange reo layers

Layer 1 — bars/flange, dia n, mm

Layer 2 — bars/flange, dia n, mm

Flange reo f_y MPa

Axial N* kN

Capacities are φM_n (φ from the Flexure tab). rect = the same web section with no flange and no flange reinforcement. Ratio = flanged ÷ rect. T-beam sections are not included in the Excel export.