July 24, 2019

Stair railing design concept considerations

Stair railing design concept notes:

1. The height of the stair handrail (from the front line of the step) should not be less than 0.90m; the height of the outdoor stair handrail should not be less than 1.05m.

2. When the stairwell width is greater than 0.20m, the vertical clearance of the handrail should not exceed 0.11m to prevent the child from falling.

3. The net width of the stairway shall not be less than the width of the step, and shall not be less than 1.10m.

4. The width of the ladder section is clearly defined in the design of the residential building. In other buildings, the requirements for fire evacuation must be met.

The width of the expressive stairs in public buildings is usually too large, but pay attention to the relationship between the setting of the handrail and the width of the step. That is: the stairs should be provided with armrests on at least one side. When the net width of the steps is up to three streams, handrails should be provided on both sides. When four streams are flown, intermediate handrails should be added.

With WiFi doorbell, can monitor home anytime, anywhere from your mobile phone, tablet. You can see, hear and speak to vistors from anywhere and remote open door for visitors if need. Built-in PIR and night vision, never miss a visitor.

WiFi doorbell Functions


Advantage:

Only have one outdoor device, receiver is your smart phone 
support both ios and Android devices 
clear voice & image
take photo and video 
Outdoor device can connect to internet by both wifi and internet cable 



Description

  • Your mobile phone can intercom with the doorbell by connect to wifi or 3G/4G
  • 1 camera can suppport 8 pcs smart phone at most 
  • Camera is CMOS 
  • With rainproof cover 
  • Remote unlock the electornic lock 
  • alarm function 
  • connect to power by adapter 
  • Hand free intercom
  • Night vision with 6IR lights in the camera



Specifications

Launch date: 2014, Aug
Camera:  1/4''/F2.4/110 degree
Distinguished:  420 line
Illumination: 2LUX
Light source:  6pcs infrared light 
Power Standby: DC 12V 1A
Power dissipation Standby: working, 3.8W
Dimensions: 160*97*40mm
Material: ABS
Power input: 12V 1A
Lock output: 12V
Operating temperature: Subzero 10 degree to +55 degree
Operating Humidity:  10-90%
WIFI standard: IEEE802.11b/g/n
WIFI mode: DSSS/CCK 11Mbps
Channel Frequency: 2412~2484MHZ
RX sensitivity:  Negative 85 dBm
TX power: 16 dBm
EVM: Negative 22 dBm
Sensor size: 1/4''
Sensor pixel:  0.3M
Lens angle: 110 degree
Aperture: F2.0mm
Night vision:  6*940NM IR LED

wifi doorbell

Smart Home Wifi Doorbell

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Shenzhen Zhuohao Intelligent Electronic Development Co., Ltd. , http://www.szactop-smart.com