How to Fix Rooftop Mobile Toilets

The fixation of rooftop mobile toilets requires a combination of measures including site selection, structural reinforcement, and counterweighting. The specific methods are as follows:

1. Site Selection and Foundation Preparation
Prioritize flat areas with good drainage to avoid low-lying, waterlogged, or soft ground. If the ground is soft, such as grass or sand, lay gravel or wooden planks in advance to form a solid foundation and ensure a level support surface. Also, check that the support feet at the bottom of the toilet are intact to prevent tilting due to uneven local stress.

2. Ground Anchor Fixation Method
Install fixing devices at the four corners of the toilet or key load-bearing positions (such as the bottom of columns):

• Use expansion screws or ground anchor pins to connect the fixing chains (straps) to the ground, ensuring that the anchor points are more than 30 centimeters deep to enhance tensile resistance.
• If the site allows, pour concrete blocks or place counterweight blocks (such as stones or metal blocks) at the bottom of the toilet to increase its stability through added self-weight. The concrete blocks should fit closely against the bottom of the toilet to prevent sliding.

3. Windbreak Ropes and Diagonal Tension Fixation
For areas with strong winds, disperse the wind force through a rope system:

• Install windbreak ropes at the top of the toilet and fix the other ends to ground stakes or heavy objects (such as concrete blocks). It is recommended that the angle between the ropes and the ground be between 45° and 60° to optimize force distribution.
• If the wind continues to be strong, adopt a "well"-shaped diagonal tension method: Use nylon ropes or steel wires to pull tightly from different angles (such as front-back and left-right) at the top of the toilet to the ground, forming multi-directional constraints and reducing shaking.

4. Additional Counterweight Plan
Increase the wind resistance by adding weight:

• Internal Counterweight: Place 2-3 bags of 20-kilogram sandbags on each side of the toilet, or use a water tank filled with clean water (ensuring the tank is sealed). The counterweight should be evenly distributed to avoid eccentric loading.
• External Counterweight: Add fixed counterweights, such as sandbags or water bags, at the bottom of the public toilet. Place at least 4-6 bags on each side, with the weight adjusted according to the size of the public toilet. Generally, it is required that there be no less than 50 kilograms per square meter. The counterweights should be firmly fixed to prevent sliding or tipping.

5. External Structure Reinforcement
Strengthen the stability of key load-bearing points:

• Set ground anchors at the four corners of the public toilet or at the bottom of columns, and fix them using expansion screws or concrete pouring. The depth of the ground anchors should exceed 30 centimeters.
• Connect the ground anchors to the top of the public toilet with steel wires with a diameter of more than 5mm to form a triangular tension structure. The tension ropes should be kept moderately tight to prevent structural deformation due to looseness.

6. Handling Special Situations
In areas with strong winds, additional ground anchors should be installed for fixation, and the fixing devices should be regularly checked for looseness. If the toilet is used for a long time, it is recommended to check the condition of the ground anchors, ropes, and counterweights once a month and promptly repair worn or corroded parts.