B06 · Advanced · 1–2 hours
BS 8110 — punching shear (slab–column)
Punching shear at internal, edge and corner columns: face stress, critical perimeters and shear reinforcement (3.7.6–3.7.7).
Tool: Education preview · Lesson: In preparation · Example: Built awaiting check · Workbook: Not applicable · Assessment: Not started
Outstanding before release: Engineering checker to verify clause mapping against BS 8110 (Parts 1 and 2) and sign off v0.1.0. Cross-checked against TCC RCC13 Punching Shear v4.9 (see evidence).
Sources
| Role | Source | Note |
|---|---|---|
| Primary | BS 8110-1:1997 (+A1–A3): 3.7.6.2–3.7.6.3 (Veff); 3.7.7.2 (v at column face ≤ 0.8√fcu or 5); 3.7.7.4 (vc from Table 3.8, perimeters at 1.5d then 0.75d steps); 3.7.7.5 (shear reinforcement); 3.7.7.6 (layout) | Withdrawn standard — education and legacy checks only (mapping awaiting checker verification) |
| Supporting | Cross-check reference: The Concrete Centre RCC13 Punching Shear v4.9 (external tool; not used in the implementation) | Comparison evidence only (mapping awaiting checker verification) |
"Primary" marks the governing clause for this exercise; "contextual" marks related clauses; "supporting" marks the design-method or data source outside the CDC. A CDC chapter mapping does not mean the CDC contains the equation used.
Prerequisites: B04 BS 8110 — beam shear (links) · Topics: Reinforced concrete, Serviceability
Lesson
Lesson in preparation. No content is published until it has been written and reviewed.
Calculator
Purpose: Punching shear checks at the column face and on successive critical perimeters, with the shear reinforcement required where vc < v ≤ 2vc.
Model: Rectangular column; rectangular perimeters with square corners; edge/corner columns flush with the slab edges; no holes.
Units: N, mm, kN, kNm; stresses in N/mm² Ranges: fcu 25–50 N/mm²; fy 250 / 460 / 500; βb 0.7–1.0
Equations: u = u0 + 8r (internal), a + 2r + 2(b + r) (edge), a + b + 2r (corner); r = 1.5d + 0.75d·i ; v = Veff/(u d) ; d = (dx + dy)/2 ; vc: Table 3.8 with 100As/bd from average of Asx, Asy ; v ≤ 1.6vc: ΣAsv ≥ max(v − vc, 0.4) u d/(fyv/γs) ; 1.6vc < v ≤ 2vc: ΣAsv ≥ max(5(0.7v − vc), 0.4) u d/(fyv/γs) (0.4 minimum applied in both ranges — conservative) ; v > 2vc: not permitted
Clauses: 3.7.6.2–3.7.6.3 (Veff); 3.7.7.2 (v at column face ≤ 0.8√fcu or 5); 3.7.7.4 (vc from Table 3.8, perimeters at 1.5d then 0.75d steps); 3.7.7.5 (shear reinforcement); 3.7.7.6 (layout)
© 2026 QP Academy. Original calculation software implementing BS 8110-1:1997 (+A1, A2, A3). BS 8110 is WITHDRAWN (superseded by BS EN 1992-1-1 and, in Singapore, SS EN 1992-1-1). For education and for checking legacy designs only — not for new design submissions.
Not covered: Holes near the column (3.7.7.7); Columns not flush with slab edges; Moment transfer calculation of Veff (enter it directly); Shearheads, bent bars, slabs with h < 200 mm when using links (3.7.7.5 note) — warning only; Detailed link layout
Version 0.1.0 Draft
EDUCATION PREVIEW — NOT YET INDEPENDENTLY CHECKED. Education preview: this calculator has not yet been independently checked by an engineer. Use for learning only — not for engineering use. Outputs are stamped and must not be used for engineering work.
Excel workbook
The workbook is available with the calculator once this version is released.
Exercises
Assessment in preparation.