What is the classification for turnstiles under 39 inches?

Turnstiles that are under 39 inches in height are classified as a normal entrance because they do not meet the criteria for more specialized classifications like revolving doors, automatic doors, or emergency exits. Normal entrances are designed for pedestrian access without any of the automated or specific exit functionalities that the other classifications imply.

Revolving doors, for instance, are typically designed to limit the amount of air exchange between the interior and exterior and manage the flow of foot traffic in a secure and efficient manner. Automatic doors generally refer to doors that open electronically, accommodating those who may have difficulties opening a standard door manually, which is not the purpose of a turnstile. Emergency exits are designated pathways that allow for a swift evacuation during emergencies and must meet certain codes that ensure wide accessibility for all individuals.

Therefore, a turnstile under 39 inches simply functions as a regular means of entry and does not possess the characteristics of these specialized classifications, making it appropriately categorized as a normal entrance.