CEA 4001 - Page 177

177
F
Figure 33 :L5
L.2.3.3 Where sprinkler deflectors are located above the bottom of beams, girders, ducts, fluorescent
lighting fixtures or other obstructions located near the ceiling, the position of the sprinklers with
respect to these obstructions shall be in accordance with figures L3, L4 and L5, as appropriate.
L.2.3.4 Continuous obstructions located below sprinklers, such as sprinkler piping, utility piping or duct
work
up to 0,3 m wide at a horizontal distance of at least 0,6m from the vertical centre-line of the
sprinklers do not require additional sprinklers below. Additional sprinklers shall be located below wider or
more closely located obstructions.
L.2.3.5 Upright sprinklers shall be positioned so that the deflector has a minimum distance of 0,180m
above the
top of the range pipe.
L.2.3.6 Roller-type conveyor and grated walkways with 50 % or more uniform openings are not
considered
as obstructions to ceiling sprinkler discharge. However, when there are more than one level
above
each other of conveyors or walkways 50 % or more open, a line of ESFR sprinklers shall be