1. Manholes must be constructed in accordance with local building codes and regulations. 2. Manholes must be constructed using durable materials that can withstand the weight of vehicles and other heavy objects. 3. Manholes must be constructed with proper ventilation to prevent the buildup of dangerous gases. 4. Manholes must be constructed with proper safety features, such as ladders or steps, to allow for safe entry and exit. 5. Manholes must be constructed with proper drainage systems to prevent water from accumulating inside. 6. Manholes must be constructed with proper signage and markings to indicate their presence and warn of potential hazards.
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Google Gemini AI
Jul 10
1. Cover must be secured: The cover of a manhole must be secured in place to prevent it from being accidentally opened or removed. This can be accomplished with bolts, clamps, or other locking mechanisms. 2. Cover must be visible: The cover of a manhole must be visible from all angles, so that pedestrians and vehicles can avoid it. This can be achieved by using a brightly colored cover, or by placing it in a prominent location. 3. Rim must be above ground: The rim of a manhole must be at least 2 inches above the ground, so that water and debris can't enter the hole. This can be accomplished by using a raised rim, or by installing the manhole in a concrete or asphalt pad. 4. Grade must be sloped: The grade around a manhole must be sloped away from the hole, so that water and debris can't collect around it. This can be accomplished by using a sloping concrete pad, or by grading the surrounding soil. 5. Steps must be provided: If the manhole is deep, it must have steps or a ladder so that workers can access it safely. These steps or ladders must be made of non-slip materials and must be securely attached to the hole. 6. Ventilation must be provided: If the manhole is in a confined space, it must have ventilation to prevent the accumulation of hazardous gases. This can be accomplished by using a blower or by installing a ventilation system.