Column pre-sizing from tributary area
Estimate the size of a reinforced concrete column from its tributary area and the number of storeys it carries: service load, required area and chosen side.
What the sheet calculates
- Average load per square metre of floor
- Service load: tributary area × number of storeys × average load
- Required area depending on the column's position (interior, edge or corner)
- Chosen square column side
- Reminder: to be confirmed by a load takedown and a buckling check
Worked example
Calculated by the BÉTONIQ PRO engine with the inputs below. It is the same working as in the software and in the Word calculation report.
The calculation output is in French, as in the software.
Inputs
- Aire influence
- 16
- Niveaux
- 2
- Position
- central
Détail du calcul
| N° | Étape | Valeur | Unité |
|---|---|---|---|
| 1 | Charge moyenne retenue | 1 000 | kgf/m² |
| 2 | Aire d'influence × niveaux | 16,0 × 2 | m² |
| 3 | Charge de service | 32 000 | kgf |
| 4 | Section nécessaire | 339 | cm² |
| 5 | Poteau carré retenu | 20 × 20 | cm |
Résultats
- Charge moyenne
- 1 000 kgf/m²
- Pserv
- 32 000 kgf
- Pserv
- 313,9 kN
- Coefficient
- 0,45
- Section
- 338,62 cm²
- Cote calculé
- 18,4 cm
- Cote
- 20 cm
- Section
- 0,2 m
Avertissement : Prédimensionnement d'esquisse (charges gravitaires). À confirmer par une descente de charges et une vérification au flambement. En zone sismique, prévoir 1 000 à 2 000 cm² minimum.
Other common calculations
- Pad footing design under a column (BAEL 91)
- Strip footing design under a wall (BAEL 91)
- Reinforced concrete beam design (BAEL 91)
- Solid slab spanning between two supports (BAEL 91)
- Straight reinforced concrete staircase design (BAEL 91)
- Reinforced concrete retaining wall stability
- Load takedown on a column
- Rebar anchorage length (Eurocode 2)
- Footing bearing capacity from pressuremeter tests (Fascicule 62)