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Foundation Project Schedule Calculator
Convert footprint and production rates into rounded task durations, then add reinforcement, inspection, curing, and a visible weather or coordination allowance.
Excavation duration-
Formwork duration-
Concrete placement duration-
Modeled active work days-
Base calendar duration-
Schedule allowance-
Planned foundation duration-
Crew and equipment cost for active work-
Decision view
Foundation critical-path strip
Foundation critical-path stripProduction work, reinforcement, inspection hold, curing, and the explicit allowance form one readable sequential plan.
Exact scenario comparisonWeather and coordination allowance (%) changes while all other entered assumptions remain constant.
| Weather and coordination allowance (%) | Excavation duration | Formwork duration | Concrete placement duration | Modeled active work days | Base calendar duration | Schedule allowance | Planned foundation duration | Crew and equipment cost for active work |
|---|
How to use Foundation Project Schedule Calculator
- Use achievable site production rates.
- Confirm which activities can overlap and which are true hold points.
- Check curing, inspection, and weather assumptions against the local plan.
Calculator guide
Understanding Foundation Project Schedule Calculator
A foundation schedule is a sequence of production activities, hold points, curing, and explicit uncertainty—not one blended duration.
Calculation method
How the calculation works
Sequence excavation, formwork, reinforcement, inspection, concrete placement, curing, and an explicit coordination allowance into one auditable project duration. Divide footprint by each production rate and round up whole days, add entered sequential activities, calculate the base duration, then add the percentage allowance rounded up.
Field handoff
Turn the estimate into a buildable sequence
A useful schedule names the gate between activities.
Worked situations
Practical examples
- A partial production day is rounded up because the task still occupies a calendar day.
- Curing adds duration but not crew cost in this simplified model.
- The allowance is applied to the full base duration.
Better inputs
Useful tips
- Create a separate procurement schedule.
- Add dewatering or soil remediation when relevant.
- Review the critical path with the superintendent.
Before relying on the result
Limitations and common mistakes
- Activities are modeled mainly in sequence.
- Permits, mobilization, testing, holidays, subcontractor calendars, and local curing rules are excluded.
- Crew cost applies only to active work days.
Reference
Key terms
- Production rate
- Footprint completed per active day.
- Hold point
- Work cannot proceed until inspection or approval.
- Base duration
- Active work plus inspection and curing before allowance.
- Schedule allowance
- Explicit contingency added to base duration.
Important note
Calculated from the entered measurements and stated coverage or quantity rules. Confirm field dimensions, waste, product requirements, structural conditions, and local codes before purchasing or building.
Frequently asked questions
Why round task days up?
A fraction of a production day still occupies a working day.
Can activities overlap?
Yes, but this simplified model is mainly sequential.
Does active cost include curing?
No. It multiplies active work days only.
Is the allowance a guarantee?
No. It is an entered planning buffer.