What specification guides the measurements when installing an escalator?

The specification that guides the measurements when installing an escalator is the metric system. This system provides a standardized set of measurements that ensures consistency and precision in the construction and installation processes. When dealing with escalators, adhering to the metric system is crucial as it aligns with international standards and practices, facilitating clear communication and reducing the potential for errors during installation.

Using the metric system allows engineers and installers to refer to specific dimensions, tolerances, and clearances that are crucial for the safe and effective operation of escalators. This system is particularly relevant in the construction industry, where precise measurements can impact safety, functionality, and compliance with regulations.

In contrast, technical drawings serve as a guide for the design and layout but do not specify measurement standards. Field assessment is more about evaluating the site conditions rather than establishing measurement guidelines. Cost estimation pertains to budgeting for the project, which, while important, does not directly influence the measurement specifications needed for installation.