The quality of a building’s vertical transportation system is determined almost entirely by decisions made at the design stage. Once the lift core is committed to a specific configuration, the building will live with the consequences of that configuration for its operational lifetime. For engineers and architects who want to make these decisions with the rigour they deserve, specialist elevator design software and rigorous elevator analysis are the tools that bridge the gap between intuition and evidence.
For engineers and architects looking for a platform that covers the full workflow of professional lift design, AdSimulo provides simulation-based traffic analysis, expert system optimisation, 3D visualisation, and BIM output in an integrated cloud-based environment purpose-built for vertical transportation design professionals.
The Performance Criteria Framework
Professional elevator design begins with the performance criteria that the proposed system must satisfy. These criteria vary by building type and reflect the different traffic patterns and occupant expectations that characterise different uses. For office buildings, the primary criteria specify handling capacity and average waiting time during the morning up-peak. For residential towers, the criteria are less stringent, reflecting the more distributed traffic pattern and greater occupant tolerance for longer waiting times. For healthcare facilities, hotels, and mixed-use developments, specific criteria apply that reflect the particular demands of those occupancies.
The selection of the correct performance criteria for a specific building is the first significant professional judgment in a lift design project. Applying office building criteria to a residential tower will produce an over-specified, over-priced lift installation. Applying residential criteria to a building with significant office or commercial occupancy will produce a system that is inadequate for the actual demand it will face. Specialist elevator design software applies the correct criteria automatically for standard building types, reducing the risk of this category of design error.
What Rigorous Elevator Analysis Involves
The Lift and Escalator Industry Association, LEIA, represents the UK’s vertical transportation sector and provides the professional framework within which elevator analysis is conducted and evaluated. LEIA’s guidance, alongside the CIBSE Guide D series, establishes the standards that professional elevator analysis should meet, covering the methodology for traffic calculation and simulation, the performance criteria that analysis results should be assessed against, and the documentation requirements for professional lift specifications.
Rigorous elevator analysis at the design stage covers the full range of traffic conditions that the building will experience, not just the up-peak scenario that most simplified calculation methods focus on. Down-peak analysis, which models the movement of people leaving the building at the end of the working day or event, produces different demands on the lift system from the up-peak. Inter-floor traffic, which occurs throughout the day as people move between floors without necessarily passing through the ground floor lobby, is a significant component of total lift usage in taller buildings that simplified analysis methods often underestimate.
Simulation vs. Calculation in Professional Practice
The professional debate between simulation-based and calculation-based lift traffic analysis reflects genuine differences in accuracy and applicability for different building types and complexities. Calculation methods, based on the simplified traffic models documented in professional guidance, provide quick, transparent estimates that are useful for early feasibility work and for straightforward buildings where the simplifying assumptions of the calculation method are well-matched to the building’s actual characteristics.
Simulation methods model the system’s behaviour directly, tracing individual passenger journeys through a statistical representation of the building population and generating performance statistics that reflect the actual complexity of the system. They are more accurate for complex buildings, non-standard traffic profiles, and systems using advanced destination dispatch control, where the simplifying assumptions of calculation methods produce results that diverge significantly from actual performance.
The professional standard has shifted clearly toward simulation for all but the most straightforward projects. The increased accuracy, the richer performance output, and the ability to model advanced control system types make simulation the appropriate method for any project where the stakes of an incorrect analysis are significant.
Elevator Design in Healthcare and Medical Office Buildings
Healthcare facilities and medical office buildings present specific vertical transportation challenges that general-purpose elevator design standards do not fully address. Patient transport requirements, including the movement of patients in wheelchairs, hospital beds, and on stretchers, demand larger car dimensions than standard passenger lifts provide. The need to separate patient, visitor, and service traffic flows in hospital environments creates multi-group lift configurations with specific traffic management requirements. Emergency evacuation requirements for healthcare facilities, including provisions for evacuation lifts that continue to operate during fire emergencies, add further complexity to the specification.
For architects and engineers working on healthcare projects, these specific requirements make the case for specialist elevator analysis even stronger than for commercial or residential applications. The consequences of inadequate lift provision in a healthcare setting, where patient safety and operational efficiency are both at stake, are more serious than in most other building types, and the investment in rigorous analysis at the design stage is entirely proportionate to these stakes.
BIM Integration and Professional Documentation
Modern elevator design software produces outputs that serve the full professional workflow beyond the traffic analysis itself. BIM output in IFC format provides a geometric model of the lift installation that can be incorporated directly into the project’s overall Building Information Model, eliminating the duplication of dimensional data and reducing the coordination errors that occur when lift designers and BIM coordinators work from separate data sources. Automated report generation produces professional documentation of the traffic analysis directly from the simulation results, covering building parameters, performance criteria, configurations evaluated, and predicted performance of the recommended design.
Final Thoughts
Elevator design software and rigorous elevator analysis are the professional tools that give engineers and architects confidence in the vertical transportation specifications they produce. For practitioners ready to move beyond simplified calculation methods to simulation-based analysis, the combination of accuracy, expert system optimisation, and integrated documentation output that specialist software provides is the most significant quality improvement available in the lift design workflow. Understanding the elevator analysis methodology is the foundation of effective use of these tools.
