Building type
Office
Office elevators are sized against the morning up-peak — the busiest five minutes of the working day — because that is the condition where lobby queues form. Prawita Karya supplies, installs and maintains elevators for commercial towers across Indonesia.
What this building type demands
Office buildings are the classic case for traffic analysis. The design condition is the morning up-peak, when a large share of the building's population arrives within a short window, and a group that copes comfortably at midday can queue badly at nine.
Shaft provision is fixed early and effectively permanently. Adding a lift to a completed tower is rarely practical, so the number and size of shafts is among the few genuinely irreversible decisions in the design — which is why the analysis belongs at design stage rather than procurement.
Buildings also change after handover. Tenant fit-outs alter floor populations, and a building let to a single occupier behaves differently from one split across many. Equipment that can be re-tuned as occupancy changes ages better than equipment that cannot.
Challenges
What makes it difficult
Morning up-peak
A large share of the population arrives within a short window.
Irreversible shaft provision
Adding shafts to a completed tower is rarely practical.
Changing occupancy
Tenant fit-outs shift floor populations after handover.
Lobby as first impression
Queues at the lift are visible to every visitor.
Solutions
How we address it
- Traffic analysis at design stage
- Passenger elevator groups sized to peak demand
- Goods and service lifts for fit-out and deliveries
- Modernization of controls as buildings change use
- Maintenance outside core business hours
- 24/7 emergency response
Products
Equipment for this building type
Services
Supporting services
FAQ
Common questions
How many elevators does an office building need?
It follows from a traffic analysis rather than a rule of thumb: the building population, number of floors, and the proportion arriving in the peak five minutes. Two towers of identical height can need materially different groups depending on floor population and use.
What is up-peak traffic?
The morning condition where most journeys start at the entrance level and travel upward. It is normally the design case for an office building, because it concentrates the heaviest demand into the shortest window.
Can elevator capacity be increased after a building is completed?
Adding shafts is rarely practical, but performance can often be improved without them — modernizing controls, re-tuning dispatch as occupancy changes, or upgrading door equipment to reduce the time spent at each floor.
Planning vertical transport for a office project?
Tell us about the building and our engineers will help you specify equipment that suits how it will actually be used.