CEA 4001 - Page 79

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When the deflector is positioned above the level of the underside of beams or joists etc., the dimensions
of 11.4.2, Figure 8 and Table 23 shall be observed in order to ensure that effective discharge of the
sprinklers is not impaired or else the beam shall be protected on either side as though it were a wall.
The distance from girders or beams to the sprinklers shall be at least 0,2m, or alternatively sprinklers may
be positioned directly above a girder or beam non wider than 0,2m at a vertical distance of at least 0,15m.
11.4.7 Roof trusses
Sprinklers shall be located at least 0,3m laterally from truss members which are no more than 0,1m wide.
If the width is greater than 0,1m the minimum distance shall be 0,6m. Alternatively sprinklers may be
positioned
directly above a truss no wider than 0,2m at a vertical distance of at least 0,15m.
11.4.8 Columns
If roof or ceiling sprinklers are placed closer than 0,6m to one side of a column, another sprinkler shall
be placed within 2m from the opposite side.
F
Figure 7- Sprinkler location relative to beams