Final surface elevations around drains in pedestrian areas should not exceed ________ above the level of the drain?

Maintaining appropriate surface elevations around drains in pedestrian areas is crucial for ensuring effective drainage and preventing water pooling. The recommended practice is to keep the final surface elevations not exceeding 1/4 inch above the level of the drain. This specification is important because elevations that are too high can lead to water accumulating near the drain rather than flowing into it. Such pooling can create hazardous conditions for pedestrians, including slip and fall risks.

A 1/4 inch height allows for minor surface variation while still ensuring efficient drainage. This measurement strikes a balance between allowing for some surface contouring for aesthetic purposes and ensuring that the functional requirements of drainage are met effectively. It's essential to adhere to this guideline in landscaping design and construction to promote safety and functionality in pedestrian areas. Thus, this figure serves as a standard that reflects optimal design considerations for preventing water retention near drains.