Understanding Strip Footings
A strip footing is a long, continuous concrete footing that runs under a wall or under a line of closely spaced columns. It spreads that line of load over a strip of soil wide enough to carry it. Because it’s continuous, it’s also called a continuous footing. When it supports a wall, it’s commonly called a wall footing, which is the term ACI 318 usos.
Where are strip footings used?
- Load-bearing walls in houses and low-rise buildings
- Basement and retaining walls
- Boundary and partition walls
- Rows of closely spaced columns, where separate pads would overlap or nearly touch
Strip Footing vs Pad Footing
| Zapata tirada | Almohadilla (Isolated) Pie | |
|---|---|---|
| Suportes | Walls or a row of columns | One column |
| Load type | nos centraremos en como calcular el empuje lateral de tierra que actúa sobre la cara posterior de un Muro de Contención debido a tres tipos de cargas superpuestas (kN / mo kip / ft) | Carga puntual |
| Forma | Long and continuous | Square or rectangular |
| Structural action | Mostly one-way bending across the width | Two-way bending |
| Typical design basis | Per unit length | Whole footing |
En pocas palabras, a pad footing collects load from one point, while a strip footing collects load along a line.
Common types of strip footing
- Plain (masa) concrete strip footing: unreinforced. Suitable for light loads and good soil.
- Reinforced concrete strip footing: has transverse reinforcement (and usually longitudinal bars) to handle bending, heavier loads, or variable soil.
- Wide strip footingramo: widened to lower bearing pressure on weaker soil.
- Stepped strip footing: steps down along its length to follow sloping ground.
Designing Strip Footings in SkyCiv
Strip footing was one of the most requested features for Diseño de la Fundación SkyCiv. It’s now available in v4.0.0. This release also brings a full UI/UX overhaul, so the module is cleaner and quicker to use.
Model it your way
- Live 3D graphics: the model updates as you change inputs.
- Complete inputs: geometría, materiales, propiedades del suelo, reinforcement layout, and load cases and combinations.
- Footing type: reinforced concrete or mass (unreinforced) hormigón.
- Wall type: reinforced concrete or masonry.
- Detailed reinforcement: full layout for both the footing and the wall, including double-layer wall reinforcement and dowel bars.
- Rebar anchorage: choose the anchorage type.
- Flexible loading: add multiple loads and customize load combinations.
Design Verification
Designs currently follow ACI 318-19, with more design codes coming soon.
- El proceso de ejecución de un diseño de muro de contención de hormigón consta de tres etapas principales: soil bearing, excentricidad, volcamiento, y corredera
- controles de fuerza: el cortante, reforzamiento, de flexión, En el caso de que la zapata se extienda también alejándose del suelo retenido
- Detailing checks: geometry and reinforcement layout
Informes de diseño
Every design produces a detailed report. You can view it in the browser, download it, or save it to the cloud with SkyCiv Project Manager so your calculations are always easy to find.
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Desarrollador de producto
licenciatura (Civil), maestría (Civil)
