Цитата(silver_7 @ 30.3.2018, 13:13)
Добрый день.
Открываем магазин в ТЦ. Потолок типа Грильятто 100*100. Перекрытия защищены оросителями.
Собственник требует дополнительно опустить на гибкой подводке оросители в плоскость потолка Грильятто 100*100.
Пытаюсь объяснить, что ороситель в данном случае бесполез, просто не сработает в случае пожара.
Есть ли какие то нормативы по этому вопросы. Буду признателен за консультацию.
Вас могут проконсультировать документы BS EN-12845 ,CEA-4001 и NFPA-13
BS EN-12845
12.4.14 Suspended open cell ceilings
Suspended open cell ceilings, i.e. ceilings with a regular open cell construction, might be used beneath LH
and OH sprinkler installations where all of the following conditions are met:
a) the total plan open area of the ceiling, including light fittings, is not less than 70 % of the ceiling plan area;
b ) the minimum dimension of the ceiling openings is not less than 0,025 m or not less than the depth of the
suspended ceilings, whichever is the greater;
c) the structural integrity of the ceiling and any other equipment, such as light fittings within the volume
above the suspended ceiling, will not be affected by operation of the sprinkler system;
d) there are no storage areas below the ceiling.
In such cases, sprinklers shall be installed as follows:
— the sprinkler spacing above the ceiling shall not exceed 3 m;
— the vertical distance between any conventional or spray sprinkler deflector and the top of the
suspended ceiling shall be not less than 0,8 m for sprinklers other than flat spray sprinklers and not
less than 0,3 m if flat spray sprinklers are used;
— supplementary sprinklers shall be installed to discharge below obstructions (e.g. light fittings)
exceeding 0,8 m in width.
Where obstructions above the ceiling are likely to cause significant interference of the water discharge they
shall be treated as walls for the purpose of sprinkler spacing.
СЕА-4001
11.4.13 Suspended open ceilings
Suspended open ceilings, i.e. ceilings having
a regular open cell construction recurring
throughout their design, may be used beneath
LH and OH sprinkler systems not involving
storage areas where the following conditions
are met:
– the total plan open area of the suspended
open ceiling, including light fittings, shall not
be less than 70% of the ceiling plan area;
– the minimum dimension of the ceiling
openings shall be no less than 0.025 m
or no less than the vertical thickness of
the suspended ceilings, whichever is the
greater;
– the structural integrity of the ceiling and any
other equipment, such as light fittings within
the volume above the suspended ceiling, shall
not be affected by operation of the sprinkler
system.
Sprinklers shall be installed as follows:
– sprinkler spacing above the ceiling shall not
exceed 3 m;
– vertical separation between any conventional
or spray sprinkler deflector and the top of the
suspended ceiling shall not be less than 0.8 m.
This distance may be reduced to 0.3 m if flat
spray sprinklers are used;
– supplementary sprinklers shall be provided
to discharge below light fittings or similar
obstructions exceeding 0.8 m in width.
Where obstructions within the ceiling void are
likely to cause significant interference of the
water discharge they shall be treated as walls
for the purpose of sprinkler spacing.
NFPA-13
8.15.14* Open-Grid Ceilings. Open-grid ceilings shall only be
installed beneath sprinklers where one of the following is met:
(1) Open-grid ceilings in which the openings are 1⁄4 in.
(6.4 mm) or larger in the least dimension, where the
thickness or depth of the material does not exceed the
least dimension of the opening, and where such openings
constitute 70 percent of the area of the ceiling material.
The spacing of the sprinklers over the open-grid ceiling
shall then comply with the following:
a ) In light hazard occupancies where sprinkler spacing
(either spray or old-style sprinklers) is less than 10 ft
* 10 ft (3 m * 3 m), a minimum clearance of at least
18 in. (457 mm) shall be provided between the sprinkler
deflectors and the upper surface of the open-grid
ceiling. Where spacing is greater than 10 ft * 10 ft
(3 m * 3 m) but less than 10 ft * 12 ft (3 m * 3.7 m), a
clearance of at least 24 in. (610 mm) shall be provided
from spray sprinklers and at least 36 in.
(914 mm) from old-style sprinklers. Where spacing is
greater than 10 ft * 12 ft (3 m * 3.7 m), a clearance of
at least 48 in. (1219 mm) shall be provided.
B ) In ordinary hazard occupancies, open-grid ceilings
shall be permitted to be installed beneath spray sprinklers
only. Where sprinkler spacing is less than 10 ft
* 10 ft (3 m *3 m), a minimum clearance of at least
24 in. (610 mm) shall be provided between the sprinkler
deflectors and the upper surface of the open-grid
ceiling. Where spacing is greater than 10 ft * 10 ft
(3 m * 3 m), a clearance of at least 36 in. (914 mm)
shall be provided.
(2) Other types of open-grid ceilings shall be permitted to be
installed beneath sprinklers where they are listed for such
service and are installed in accordance with instructions
contained in each package of ceiling material
Сообщение отредактировал BTS - 31.3.2018, 17:37
Системы автоматического пожаротушения для современных подвесных потолков типа грильято, Журнал Сантехника 6\2017
5.12.2017, 12:17
