【 Weak current College 】 fire shutter in fire design problems and solutions

Current fire shutter in some public buildings, particularly in the shopping centre market Hall, exhibition hall and other places is more widely applied. Such public building area is too large, exceeded the maximum allowable fire compartment area, taking into account the need to use, in accordance with the regulations set up firewalls do have difficulty, you can take special fire protection processing method, namely the setting as the Division of fire prevention Division separated facilities for fire curtain, curtain folds, spacious premises meet the application requirements, there is a fire, press the control program, the fire under control in a fireproof partition scope. The authors combine in recent years several influential fire and daily supervision and management of the discovery of the problem, try to analyze fire shutter in the design and use of some problems and propose appropriate countermeasures. Problems of the main problems:

First, the design selection lax, do not conform to the current specification requirements.

The architectural design fire protection standard (GB50016-2006), section 7.5.3, "senior civil building design fire protection standard (GB50045-95) section 5.4.4 shall adopt regulations, fire compartment fire curtain separated, fire curtain of fire resistance should not be lower than 3.00h. When fire shutter for fire resistance with current national the doors and shutter fire resistance test method on the dorsal surface GB7633 fire conditions of temperature rise may not set up an automatic sprinkling system protection, when using do not include back fire surface temperature rise as fire resistance determinant conditions of fire curtain, curtain sides should set an automatic sprinkling system protection systems sprinkling duration should not be less than 3.00h. The doctrine of the 2005 revision, buildings》 2006 implementation, however, in 2005, 2006 or even 2007, some new, internal decoration engineering project design is still not in accordance with the specification design, in fire partitions using fire curtain separated with excluding back fire surface temperature rise as fire resistance determinant conditions of fire shutter, i.e. normal fire shutter, and do not set the spray protection. Some construction units in decoration transformation, that is usually used as special fire shutter using double double curtain inorganic composite fire curtain construction installation trouble, need to be in the original single curtain rail adds track to replace shutter, unwilling to invest. At the same time in the beautiful compared with foreign countries, some gaps, some upscale shopping malls in the selection of some concern, worry when they affect the overall image and grade of shopping centres, leading out-of-compliance requirements.

2. construction and installation quality is not passed, it is difficult to guarantee the performance of fire smoke.

First fire shutter itself quality varied, making poor, some inorganic fiber composite curtain surface significantly skewed, jumper, breakage of the phenomenon, it is difficult to guarantee quality. 2. construction and installation quality is not high, the construction personnel business generally is not high, supervision units tend to ignore these tiny link, construction unit and the lack of professional staff, fire curtain construction, roller shutter shaft is not closed, and some have even with beam 10-20cm even greater distance, it is difficult to later rectification, axis between the upper and beam only use inorganic composite curtain surface coverage, and use only single-layer, also apparently not reach 3.00h of fire resistance requirements, in order to pursue a more spacious effect that will fire shutter that span more than 8 meters, in the upper left of the pipe through a gap between, and both sides of the firewall connection does not close and so widespread, these have a direct impact on the fire shutter fire smoke effect.

III day-to-day maintenance and management are not in place, it is difficult to guarantee fire fire shutter normal action.

Daily use units on fire shutter maintenance management is weak, not on the sprinkler system, alarm system, the degree of importance. Fire shutter below the dumps cargo award-winning no-repeat, become "habitual" violations, directly affects the normal fire curtain. Fire curtain dropped after the signal is not feedback to eliminate control center or feedback address is inconsistent with the site, there's fire shutter power does the transmission, some fire shutter application in more places, these types of issues more generally. 2008 Urumqi "1.2" dehuiguojiguangchang fire, fire area 6 million 5 thousand square meters, the loss of over three million, also created three firemen sacrificed, the accident investigation identified as fireproofing fire shutter movement is not in place, resulting in high temperature smoke early in the fire quickly spread along the escalator up to ignition of fuel, resulting in the rapid spread of fire.

According to statistics each escalator worth mentioning is open 6 fire shutter, without a ladder around 6 worth mentioning shutter is all down, a decline of up to 3 worth mentioning shutter, market total 129 worth mentioning fire shutter, the fire action worth mentioning is the fate of only 30, only accounted for 23.2%, the reason is that units daily maintenance management are not in place, it cannot guarantee that each is worth mentioning is the effective fire curtain intact, the quality of staff is not high, the early direct will always fire wire power down, resulting in fire-fighting facilities not actions.

The above problems, combined with the daily supervision and management of work, the following work steps.

First, strictly regulate the design, from the source to improve fire shutter application for accuracy and reliability.

Enhance the design, construction, construction unit training, active application of the new fire code violations to design units, of the mandatory provisions of violations investigation and handling, as well as the construction units require design or construction units reduce the fire technical standards for design, construction, and other behavior, supervise the construction, design, construction, project management, and other units in accordance with the law on construction of fire is responsible for the design, construction quality, full implementation of the main construction engineering quality of fire, from the source specification design, behavior, reduce the risk of construction. The strict implementation of the national fire code for technical standards, fire shutter design application that fundamentally improve fire shutter application accuracy.

II. strengthening and improving the site inspection, fire curtain construction quality.

Fire shutter during construction problems, often after the end of the construction of correction and difficult, for example problems with beam gap,After rectification cannot fully meet the requirements. So at the construction stage, the Fire Department should increase its site and checks, timely detection of problems, on construction design in accordance with the fire and the fire technical standards document construction, reducing fire construction quality violations, severely punished. Shenyang commercial city fire, shopping centre, 1-6, divided into 27 fire partitions, involving more worth mentioning fire shutter, fire, only 6 6 worth mentioning fire curtain goes down, the survey found that 6 worth mentioning fire shutter control modes and other different, increased yirongpian control. The fire shutter (GB14102-2005), section 6.4.7 expressly fire shutter release should assemble temperature control device, when the release mechanism of liquid components surrounding temperature reached 73 ℃ ± 0.5 ℃, release the shutter operation, according to the weight reduction should be turned off. Site construction is finished, this feature is also very difficult to test, so you will need in the construction process to strengthen inspection of construction quality.

III. strengthen maintenance, ensure that the fire shutter fires can play.

Fire departments to strengthen supervision and guidance units, improving unit on fire shutter importance require units in daily fire inspection, inspections, to check the fire shutter as an important component to finish, ensure that each is worth mentioning is fire shutter not pile up incidentals, power, kept in such good order, manual and automatic control mode normal, normal, address feedback signal, linkage control properly, fire safety managers to be familiar with each worth mentioning is the location of fire curtain, periodic checks, maintenance, release is not installed on the device for temperature control of fire shutter to be retrofitted to ensure that fire fire shutter can play a good role. The author of a large shopping centre, where the city in case of fire, in the weekend opening hours, as the normal action fire curtain, will fire effectively controlled in the Atrium, greatly reducing the spread of fire, reducing fire losses, but also for the evacuation for valuable time. The units do not carry out fire safety duties, could not guarantee fire shutter sound valid, under the fire service law article 60 shall be punished according to law, in accordance with the law, the supervision unit annual fire facilities to carry out a comprehensive testing to ensure effective fire curtain intact.