【 Weak current College 】 barrier-free design help-call system

According to the urban roads and constructions barrier-free design standard "JGJ50-2001 section 7.8.2 (mandatory provisions) regulations, in public, Office and design of high-rise buildings must have accessible toilet for help call button.

I. design background

With China's international status, on China's human rights issues in the international community is more and more attention. In the 1990s an anti-China turmoil engulfed, one of the China disabled persons ' guarantee facilities perfect and healthy. To this end, our national organization of academic experts and specialized departments developed for persons with disabilities in the construction of the barrier-free facilities. And the urban roads and constructions barrier-free design standard "JGJ50-2001. At the same time, in some public buildings and traffic facilities publish some mandatory design specifications. We can see that our country is to promote accessibility for persons with disabilities.

2. accessibility for help call the basic requirements for system design

In the State of the urban roads and constructions barrier-free design standard "JGJ50-2001 section 7.8.2 bar: private toilet design barrier-free facilities requirements call button," from the ground 0.40 ~ 0.50m Office should be set for help call button ". In addition to accessibility system should consider the following questions.

1. turn the call button should work at low pressure condition, avoid wet and risk by water, you should design occurs in a location convenient for people with disabilities to touch.

2. in the outdoor light displays the alarm to sound device, which prompts the fighters find the location of the call for help, it is recommended that the appliance design outdoors over the door.

3. for a number of requests for assistance call button for the location of the project requirements, the person on duty can be found under position coding needs relief workers.

4. also need to consider the emergency power supply requirements, in a power state is more likely to have problems, you should ensure the system is working properly.

3. Design

1. independent of barrier-free bathroom design: barrier-free facilities nearby settings for help call button, set the outdoor over the door sound and light alarm screen, coding by using the two coding floors.

2. barrier-free bathroom design with male and female bathrooms mixed: in indoor design help-call button respectively, outdoor set sound and light alarm screen, if men and women toilet-adjacent to set the same coding, alert the toilet press help-call button corresponding sound and light display warning light to avoid accidentally into the bathroom to cause unnecessary trouble.

3. disabled persons channel settings: help-call button in the channel the uniform distribution, at the entrance to set sound and light display, if the channel is long, you can add code to order by floor number can be a four-digit code.

4. Design and illustration

Legend (Figure 1)

Barrier-free design bathroom mixed (Figure 2)

Independent accessible toilet (Figure 3)

N-floor hybrid design system diagram (Figure 4)
5. design of pipelines and reserved

If the barrier-free design in lower and upper floor system consistent position, embedded wires and tubes can be designed to up and down the leader programme, which can reduce system alignment distance signal transmission. Bottom approach pipeline can design in turn call the location of the switch, or you can design in the bathroom door sound and light display location. In accordance with the regulatory requirements, and if it is out with the use of galvanized pipe G15, if that is the dark laying inside a wall PVC plastic pipe can be used.

If a system call help-point less than 3 points, and the guards or guards ' room to be able to hear the sound and light display sound, the system can not set location coding host. For no host systems, sound and light display Department design 220V power, sound and light display and turn the call button between RVV2× 0.5 sheathed cable.
6. design system discussion

Accessibility help-system call is an independent system, it is not recommended to use alternative fire system.

1. the use of fire-fighting system and acceptance of alternative exists.

2. the use of fire hand reported effects on fire protection system button, hand report button is not suitable for persons with disabilities.

3. fire alarm with sound and light, sound and Flash too harsh and bright, easy-to-unnecessary fear and misunderstanding of unforeseen accidents.

4. the use of other weak electricity system is prone to interference and increased investment costs.