NATURAL EXHAUST SYSTEMS
NATURAL VENTILATION SYSTEMS
NATURAL LIGHTING SYSTEMFire ProtectionSoftware
Do you have a NSHES project with special sizing requirements?
Basso Luce Aria makes available to its customers and professionals a design service using the methods of Fire Safety Engineering for maximum design efficiency.
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FIRE SAFETY ENGINEERING
Fire engineering stems from a huge international research effort, developed by the ISO Technical Committee, in which the USA, UK and Japan are particularly active.
The Italian Ministerial Decrees of 9 May 2007 and 3 August 2015 provide for the use of engineering methods for building fire safety design, in particular for complex settlements, of architectural and/or constructional importance, those of artistic or historical value or those located in urban settings of particular specificity.
In particular, the new fire prevention code recognises fire engineering in the search for alternative solutions to the performance levels provided by prescriptive methods. The study of the trend of hot fumes and the temperatures that develop inside rooms make this method decidedly more efficient, also in the case of localised fires, which are always difficult to tackle using the traditional approach.
Several cases where Fire Safety Engineering is applied for the sizing of natural smoke and heat exhaust systems:
- Small size of the areas to be protected. The surface area of the rooms is less than the lower limit of the field of applicability of the UNI 9494 standard of 600m2.
- Insufficient intake of fresh air from outside. In cases where the ratio between the surface area fresh air intake (SCT) and the surface area of smoke exhaustion (SUT) is lower than 1.5.
- The distances between the intake of fresh air and the layer of smoke cannot be maintained. In cases where the distance between the upper edge of the fresh air intake openings from the layer of smoke is less than 1m (or 1.5, 2 m).
- Need to make non-standard smoke and heat exhaust systems: non-standard length and width or risk of plugholing. In cases where the holes available for installation of the smoke and heat exhaust systems do not allow the use of standard models, for example long and narrow holes, or where the reciprocal distances between the exhaust systems cannot be maintained.
- Multi-level ceilings. In cases where the ceiling of the rooms to be protected is at different heights, the capacity of the smoke and heat exhaust systems varies according to the installation height.
- Other cases where standard UNI 9494 cannot be applied.
