<\/p>\n
If your project is still in the structural construction stage, confirming the elevator shaft dimensions before concrete casting is not a detail that can be postponed.<\/p>\n
These dimensions will subsequently affect the cabin type, door opening, pit depth, overhead clearance, component fixing points, and the ability to install a system suitable for the building\u2019s intended use.<\/p>\n
More importantly, elevator shaft dimensions before concrete casting should not be selected according to a fixed measurement assumed to suit every project. They should be determined according to the selected elevator specifications, capacity, speed, number of stops, operating system, and entrance arrangement, with architectural, structural, and electrical requirements also reviewed.<\/p>\n
This guide explains what should be checked before closing the formwork and casting the concrete and how to reduce coordination errors that may lead to expensive structural modifications.<\/p>\n
The elevator shaft is the vertical space within which the cabin and its components move. It is therefore part of the building rather than simply an empty area reserved for equipment.<\/p>\n
When concrete work is completed before the elevator drawings are approved, any subsequent change may require demolition, reshaping of openings, modification of finishes, or alteration of the elevator specifications.<\/p>\n
The decision becomes even more sensitive in Saudi projects requiring early coordination between different design disciplines. The Saudi Building Code also aims to achieve minimum safety, durability, and structural stability requirements for buildings and facilities.<\/p>\n
Begin by selecting the system rather than the dimensions. Then confirm the elevator shaft dimensions before concrete casting according to the approved drawing.<\/p>\n
Traction elevators, hydraulic elevators, home elevators, passenger elevators, and freight elevators may all have different spatial requirements.<\/p>\n
The dimensions must therefore be obtained from the technical drawing for the selected system rather than copied from a commonly used measurement in a previous project.<\/p>\n
Changes in capacity and use affect the cabin dimensions and component arrangement.<\/p>\n
The requirement to transport a hospital bed or wheelchair may result in different entrance, cabin, and circulation dimensions from those of a standard passenger elevator.<\/p>\n
A commonly used size is therefore insufficient. The cabin must be coordinated with the capacity, intended use, and elevator type.<\/p>\n
The door opening is not equal to the dimensions of the cabin or shaft.<\/p>\n
The following must be reviewed:<\/p>\n
A common mistake is to construct the opening according to an approximate architectural measurement and later discover that the actual door details require a different width or position.<\/p>\n
The pit depth and free space above the highest stop, or headroom, are among the most important elevator shaft dimensions before concrete casting.<\/p>\n
These dimensions depend on the elevator type, speed, components, and safety arrangement. They are not additional spaces that can be reduced arbitrarily.<\/p>\n
EN 81-20 addresses safety spaces and clearances within the pit. It also requires the shaft structure to withstand loads generated by the equipment, guide rails, and different operating conditions.<\/p>\n
The elevator shaft requires walls, floors, and ceilings capable of supporting the loads specified in the design.<\/p>\n
The structural team must know where guide rails and other components will be fixed and check whether any beams, columns, or structural elements interfere with the elevator\u2019s path.<\/p>\n
Use the following table as a hold point before concrete casting:<\/p>\n
| Item<\/th>\n | What Should Be Verified?<\/th>\n<\/tr>\n<\/thead>\n |
|---|---|
| Elevator type<\/td>\n | System, capacity, speed, and number of stops<\/td>\n<\/tr>\n |
| Shaft dimensions<\/td>\n | Clear width and depth after finishing<\/td>\n<\/tr>\n |
| Grid lines<\/td>\n | Shaft alignment with architectural and structural grids<\/td>\n<\/tr>\n |
| Doors<\/td>\n | Opening widths, levels, and entrance directions<\/td>\n<\/tr>\n |
| Pit<\/td>\n | Depth, waterproofing, drainage, and safe-access requirements<\/td>\n<\/tr>\n |
| Headroom<\/td>\n | Height and clearances above the cabin<\/td>\n<\/tr>\n |
| Walls<\/td>\n | Vertical alignment, thicknesses, and fixing points<\/td>\n<\/tr>\n |
| Structural conflicts<\/td>\n | Beams, columns, services, and projections<\/td>\n<\/tr>\n |
| Electrical systems<\/td>\n | Power and control routes and system requirements<\/td>\n<\/tr>\n |
| Documents<\/td>\n | Approved drawing and technical data from the elevator supplier<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n This review ensures that the elevator shaft dimensions before concrete casting result from engineering coordination rather than on-site judgement.<\/p>\n Common Errors That May Restrict the Project<\/h2>\nThe most expensive mistake is casting the shaft before approving the elevator.<\/p>\n Other common errors include:<\/p>\n
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