ElecTech Posted September 4, 2018 Share Posted September 4, 2018 Quick design conundrum... We have had a tender through to quote a L3 system in a 100mx100m warehouse with internal offices at the front (the standard type of warehouses nowadays, sheds with an office). The way I interpret L3 is that all escape routes must be covered etc., my question is - would the bulk warehouse be classed as an escape route? I'm presuming so, if so the L3 is very close to an L1 except a cleaner cupboard or two, but even in a cleaner cupboard scenario, the argument is there to be had that EVERY room is an escape route if it has a potential of having people in at any one time? Someone must know more on this than me & there must be a explanation, I cant get my head around that every room or corridor will be an escape route in any building or has the potential to be...? I don't see a huge difference at all between L1 & L3? Cheers, Quote Link to comment Share on other sites More sharing options...
james.wilson Posted September 4, 2018 Share Posted September 4, 2018 Imo easy way, if it's got an external door or fire door or change of level its an escape route. Also any corridor or area with areas of it Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
Shaunb1905 Posted September 5, 2018 Share Posted September 5, 2018 (edited) As above A lot of the time I find L3s can be very similar to L1 depending on the layout so I just go L1 anyways Edited September 5, 2018 by Shaunb1905 Quote Link to comment Share on other sites More sharing options...
Amps Posted September 5, 2018 Share Posted September 5, 2018 1 Quote Link to comment Share on other sites More sharing options...
al-yeti Posted September 5, 2018 Share Posted September 5, 2018 23 minutes ago, Amps said: Why have the two cp in those locations the two away from exits? Quote Link to comment Share on other sites More sharing options...
Amps Posted September 6, 2018 Share Posted September 6, 2018 7 hours ago, al-yeti said: Why have the two cp in those locations the two away from exits? Dont ask me I wasn’t involved in the design stage Quote Link to comment Share on other sites More sharing options...
Shaunb1905 Posted September 6, 2018 Share Posted September 6, 2018 Travel distance doesn't seem to be more then 45m or reduced to 25 for special hazards? Quote Link to comment Share on other sites More sharing options...
Amps Posted September 6, 2018 Share Posted September 6, 2018 Could be any of these Quote Link to comment Share on other sites More sharing options...
james.wilson Posted September 10, 2018 Share Posted September 10, 2018 as above id say search distance Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
sparky999 Posted September 10, 2018 Share Posted September 10, 2018 5.1.3 Category L systems Category L systems are automatic fire detection and fire alarm systems intended for the protection of life. They are further subdivided into: a) Category L1: systems installed throughout all areas of the building. The objective of a Category L1 system is to offer the earliest possible warning of fire, so as to achieve the longest available time for escape; b) Category L2: systems installed only in defined parts of the building. A Category L2 system ought to include the coverage necessary to satisfy the recommendations of this standard for a Category L3 system; the objective of a Category L2 system is identical to that of a Category L3 system, with the additional objective of affording early warning of fire in specified areas of high fire hazard level and/ or high fire risk; c) Category L3: systems designed to give a warning of fire at an early enough stage to enable all occupants, other than possibly those in the room of fire origin, to escape safely, before the escape routes are impassable owing to the presence of fire, smoke or toxic gases; NOTE 1 To achieve the above objective it is normally necessary to install detectors in rooms which open onto an escape route (see 8.2). d) Category L4: systems installed within those parts of the escape routes comprising circulation areas and circulation spaces, such as corridors and stairways Quote Peter Robinson Freelance M:07889038650 Link to comment Share on other sites More sharing options...
sparky999 Posted September 10, 2018 Share Posted September 10, 2018 d) MCPs should be located on escape routes and, in particular, at all storey exits and all exits to open air that lead to an ultimate place of safety (whether or not the exits are specifically designated as fire exits). Those located at storey exits may be sited within the accommodation or on the landing of a stairway to which the storey exit gives access (see Figure 6). In multi-storey buildings with phased evacuation, in which only a limited number of floors are evacuated at one time, only the former option applies; under these circumstances, MCPs should not be located on stairway landings, as persons travelling down the stairway might operate an MCP several floors below that on which a fire is located, resulting in evacuation of inappropriate areas. e) Distribution of MCPs should be such that no one need travel more than 45 m [except where 20.2f) applies] to reach the nearest MCP, measured along the route that a person would actually follow taking into account the layout of walls, partitions and fittings. If, at the design stage, the final layout of the premises is unknown, the maximum straight line distance between any point in the building and the nearest MCP should not exceed 30 m [except where 20.2f) applies]; after final fit out of the premises, the limit of 45 m should still then apply. NOTE 4 These distances are arbitrary, but reflect the maximum acceptable distances between any point and the nearest storey exit commonly applied to many premises. f) The figures of 45 m and 30 m recommended in e) should be reduced to 25 m and 16 m, respectively, in the following circumstances: Quote Peter Robinson Freelance M:07889038650 Link to comment Share on other sites More sharing options...
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