Proportion of Mobile Toilets in Civil Air Defense

The proportion of mobile toilets in civil air defense projects should be dynamically adjusted based on the specific purpose and the number of people seeking shelter, with the core basis being the 'Design Code for Civil Air Defense Basements'. The specific standards are as follows:

I. Ratio of Male to Female Toilet Cubicles In civil air defense projects, the ratio of male to female toilet cubicles is typically set at 1:1, suitable for conventional scenarios such as second-class personnel shelter projects. This ratio is designed based on the balanced gender distribution of the sheltering population and can meet basic usage needs. For projects with special purposes (e.g., medical rescue projects), the ratio needs to be adjusted according to the actual personnel composition, but the code does not specify exact values, requiring further discussion based on the project type.

II. Calculation Standards for the Number of Toilet Pans The number of toilet pans needs to be calculated separately based on the number of people seeking shelter and their gender, with the core parameter being the conversion standard of 0.5 toilet pans per person:

1. Male Toilet Cubicle Calculation: Determine the demand for toilet pans based on 1.0% of the number of people seeking shelter, with urinals converted at 0.5 per person. For example, for 900 males, 18 toilet cubicles need to be configured (900 × 1.0% = 9 people, 9 ÷ 0.5 = 18 cubicles).
2. Female Toilet Cubicle Calculation: Determine the demand for toilet pans based on 1.3% of the number of people seeking shelter, with toilet pans also converted at 0.5 per person. For example, for 900 females, 23 toilet cubicles need to be configured (900 × 1.3% = 11.7 people, 11.7 ÷ 0.5 ≈ 23 cubicles). Calculation Logic: Since females generally take longer to use the toilet than males, the code balances usage efficiency by increasing the ratio coefficient (1.3% vs 1.0%) to avoid queuing and congestion.

III. Adjustment Rules for Special Scenarios

1. Medical Rescue Projects: It is recommended to install flush toilets instead of mobile toilet pans to meet hygiene standards and the usage needs of the wounded.
2. Professional Team Equipment Shelters, Power Station Machine Rooms: Toilets may not be installed, and personnel toilet needs should be met through adjacent projects or external facilities.
3. Dynamic Adjustment Principle: For projects with mixed purposes (e.g., combining personnel sheltering and material storage), the standards corresponding to the main function should be followed, and a 10%-15% buffer should be reserved to cope with unexpected demands.

IV. Implementation Points

1. Code Basis: All the above standards are derived from the 'Design Code for Civil Air Defense Basements' and must be strictly followed.
2. Project Type Adaptation: Second-class personnel shelter projects should follow the basic ratio, medical rescue projects should upgrade facilities, and professional team equipment shelters can simplify configurations.
3. Verification of the Number of People Seeking Shelter: The actual design capacity of the project should be used as the basis to avoid overloading and deterioration of hygiene conditions.