Коробка / несущие конструкции
Esta etapa cubre la ejecución de la estructura portante: muros, columnas, vigas, forjados, escaleras provisionales y piezas metálicas. Incluye montaje, control geométrico, verificación de capacidad portante y protección frente a corrosión. Se ejecuta según proyecto estructural y especificaciones; la secuencia, el replanteo y la coordinación con cimentación y cerramientos son fundamentales. Las principales actividades comprenden armado, encofrado, hormigonado o montaje metálico, así como comprobación de anclajes y juntas. Un control documental y ensayos puntuales permiten identificar desviaciones tempranas y reducir retrabajos.
Por qué este stage se encarece cuando se omite
Resumen de alcance y control
Structure is where early geometry, reinforcement, formwork, and connection decisions become locked into the physical building. The expensive errors are not only structural-capacity issues; they are load-path interruptions, misplaced anchors, low concrete cover, weak curing, honeycombing, slab deflection, and joints that later create cracks, leaks, or finish conflicts.
Errores caros en este stage
- Interrupted load paths force expensive strengthening, added steel plates, new anchors, or redesign after the frame is already progressing.
- Low concrete cover and honeycombing are hidden durability defects that often surface later as corrosion, leaks, or repair disputes.
- Weak formwork or poor pour control creates geometry errors that then affect facade, doors, stairs, partitions, and finishes.
- Unplanned construction joints or poorly prepared cold joints become crack lines, leak paths, or weak interface zones.
- Slab deflection and tolerance drift show up late as cracked tiles, ponding, ceiling lines, and joinery conflicts.
Escenarios de error vinculados
Walls are accepted too often as visible geometry only. For cost control they must be checked as structural, dimensional, and interface elements because every later opening, facade return, plaster tolerance, and service chase depends on them.
Fallo probable
- Walls pass visual inspection but drift from grid, creating facade and interior tolerance problems.
- Openings are corrected by finishes rather than by structural geometry control.
- Service routes are cut after the wall is built and interrupt the intended load path.
Por qué cuesta más corregir tarde
Late wall correction usually crosses structure, plaster, openings, facade, MEP chases, and finishes instead of staying within one trade.
Señal de control
- Confirm wall position, plumbness, thickness, opening dimensions, and bearing logic before the next element closes the work.
- Check reinforcement, ties, embedded items, and construction-joint treatment where walls connect to slabs, beams, and columns.
- Verify that service chases or penetrations do not weaken structural zones or create uncontrolled crack paths.
Columns concentrate load-path, cover, formwork, and embed risk. A small alignment or cover mistake here can become a structural review, facade tolerance issue, or long-term corrosion problem.
Fallo probable
- Cages shift during the pour and reduce cover on one face.
- Column faces bulge or twist because formwork bracing was weak.
- Honeycombing is patched cosmetically before the structural significance is assessed.
Por qué cuesta más corregir tarde
Once slabs, walls, facade lines, or finishes depend on the column position, correction can require scanning, breakout, jacketing, or redesign.
Señal de control
- Check column location, verticality, cage stability, lap zones, and cover spacers before concrete placement.
- Verify formwork bracing and pour method so the column does not move or honeycomb during placement.
- Confirm embeds, starter bars, and future connection points are fixed to templates, not positioned by eye.
Slabs connect structural performance to finish quality. They set levels, support partitions, carry future loads, and define whether wet areas, floors, ceilings, and doors will behave as expected.
Fallo probable
- Sleeves and openings are added after reinforcement inspection and weaken local slab logic.
- Young slabs are loaded too early by blocks, tiles, equipment, or stacked materials.
- Level drift is hidden by screed until doors, drains, tiles, or thresholds expose the defect.
Por qué cuesta más corregir tarde
Late slab correction damages schedules because it can affect structural approval, screed, waterproofing, ceilings below, and finished floor build-ups at the same time.
Señal de control
- Verify reinforcement, cover, openings, sleeves, edge formwork, and level control before the pour.
- Confirm curing, early loading restrictions, and protection against premature cutting or heavy storage.
- Check slab level, flatness, deflection-sensitive areas, and drainage-critical zones before screed or finish work starts.
Joints and embeds are small in size but high in consequence. They decide whether steel, facade brackets, equipment supports, and future packages connect to the frame without drilling, guessing, or breaking finished concrete.
Fallo probable
- Anchor bolts move during the pour and no longer match base plates.
- Cold joints are accepted without surface preparation or water control.
- Embed locations are not documented, so later trades drill blindly into structural concrete.
Por qué cuesta más corregir tarde
Late embed correction often means scanning, drilling, chemical anchors, steel adaptation, waterproofing damage, and responsibility disputes between trades.
Señal de control
- Check anchor-bolt templates, embedded plates, sleeves, and cast-in items against the final connection drawings.
- Verify construction joints are clean, keyed, reinforced, and waterproofed where required before the next pour.
- Record embedded item locations clearly for later steel, facade, MEP, and handover teams.
Glosario relacionado
Ruta continua por la que cargas de cubierta, losas, vigas, muros y columnas llegan a la cimentación.
Distancia entre armadura y superficie de hormigón que protege el acero y ayuda al desempeño estructural.
Control de humedad y protección después del vertido para que el hormigón desarrolle resistencia y durabilidad.
Molde y sistema temporal de soporte que mantiene el hormigón fresco en la geometría requerida.
Junta creada donde un vertido se detiene y continúa después, requiriendo continuidad estructural e impermeable.
Vacíos o zonas porosas causadas por mala compactación, armadura congestionada, fugas de encofrado o vertido deficiente.
Fijación embebida o postinstalada que transfiere esfuerzos entre hormigón, acero, equipos o elementos de fachada.
Movimiento vertical de una losa bajo carga que puede afectar estructura, acabados, particiones y drenaje.
Elementos de acero que mejoran la tracción del hormigón.
Clase de resistencia a compresión especificada.
The planned order in which construction activities are executed so each trade has the right access, information and inspection status.
The amount of work a crew or resource can complete in a defined time, usually measured per day, shift or labor-hour.
A required pause in the work sequence where an inspection or approval must happen before work continues.
A quality control plan that lists inspections, tests, acceptance criteria, hold points and required records for a work package.
Temporary structures, services or controls used to build the permanent works safely and efficiently.
Convierta riesgo en acción
Abra el checklist vinculado antes del sign-off y vuelva al stage guide para mantener las decisiones alineadas con el presupuesto y el scope del work package.