What's the weight of an empty ADA-compliant portable toilet?

An empty ADA-compliant portable toilet typically weighs 250 to 300 pounds. It is heavier than a standard unit because it is larger, has a wider door, internal grab bars, and often a larger holding tank.

You should tell your deck builder that weight. The deck should support at least 300 pounds concentrated on the unit's footprint, which is about five feet by five feet. The unit also needs to be placed on level ground to prevent tipping. Since the deck is on grass, the builder should ensure the structure is stable and the unit is secured with staking and tie-downs if the area is windy.

For your wedding, remember that the ADA cluster rule requires at least one ADA-compliant unit when you have a cluster of portable toilets. A good planning guideline for events is about one unit per 50 to 75 people for a four-hour event, but you should add more units if you are serving alcohol or the event is longer. Weekly service is the norm, but for a single-day event like a wedding, the rental company will typically service the units after the event is over.