Fire safety Assistant calculation: Background information

Calculate the coverage of fire-fighting equipment with the Saval Brandveiligheid Assistent™ by completing a number of steps.

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1.

The plug-in generates a circle centred on the fire hose. The Dutch standard specifies a maximum walking distance to a fire extinguisher of 20 metres (NEN4001). The 2012 Buildings Decree specifies a correction factor for the walking distance, known as the 'adjusted walking distance'. The maximum adjusted walking distance between a fire hose reel (see paragraphs 1 and 2) and any point of the floor of a user function is the length of the fire hose plus 5 metres (the projection distance of water from the hose) (wwbouwbesluitonline.nl). This means 2/3 of the length, or 67%.

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2.

Rooms with doors are included in the calculation. Rooms without doors are excluded, so their floor areas do not count towards the total.

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3.

Walking distances are corrected by the distance from the walking line to the wall. The plug-in uses the 'distance from the walking line to the wall' to calculate the walking distance around corners. This is particularly relevant for stairwells and doors, but also for corners and walls. If the box ‘settings in accordance with Dutch standard’ is checked, the plug-in automatically enters the value as 300 (mm).

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4.

Rooms which are set as fire compartments are not included in the calculation and are indicated with a yellow line. If a door is a fire door, it is regarded as part of the wall. Rooms designated as fire compartments are excluded from the calculation, so their floor areas do not count towards the total area.

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5.

The extinguisher coverage percentage is shown in the top left-hand corner of the main menu.

Extinguisher coverage is given as a percentage (%) and the number of square metres covered (m2), with the two being the same. In the image, 64% is equivalent to 156 m2. 'Extinguishers' are understood to mean both fire extinguishers and fire hose reels.

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