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THE MAIN ASSESSMENT POINTS FOR FIRE RESISTANT STORAGE IN ACCORDANCE WITH PGS 15.
(based on a steel main structure).
There are, of course, many ways to make a storage facility fire resistant but four very basic and important points must always be met.
1. All units must be supplied with a structural strength calculation in accordance with the Buildings Decree.
For steel main load-bearing structures, the calculation must at least be made in accordance with the following NEN standards:
- NEN 6702 TGB 1990 Load and Deformations
- NEN 6770 TGB 1990 Steel Structures
- NEN 6771 TGB 1990 Steel Stability
- NEN 6772 TGB 1990 Steel Joints
2. The fire resistance of a steel main load-bearing structure to the failure criterion must be determined in accordance with NEN 6072, the arithmetical determination of the fire resistance of building components, steel structures (or the relevant Eurocodes and European standards).
The calculation should take into account that the steel main load-bearing structure is able to carry the weight of the room-sealing building parts attached to it, for example sandwich panels and/or doors, in case of a fire load "from the inside" and in case of a fire load "from the outside" during at least 60 minutes and will not collapse.
If the main load-bearing structure must also carry the total weight of pallets and/or IBCs in storage, then this load must also be included in the calculation.
A manufacturer may choose to achieve a certain level of fire resistance on the "failure" criterion:
- overdimain a main supporting structure,
- provide a main supporting structure with a fire resistant covering , or
- a main supporting structure with a fire resistant coating.
With regard to fire resistant cladding and/or fire resistant coating of a steel main supporting structure there are a number of issues that need to be known and calculated in advance.
These include the steel profiles used (the required thickness of a coating can differ for each profile), the number of sides that can come into direct contact with the heating source and the environment or situation (loads!) in which the construction will be placed.
There is therefore a precise relationship, provable by calculation, between the load on the main load-bearing structure, the steel section sizes/thicknesses to be chosen for this and the thicknesses of a fire resistant covering or the coating method and the coating thickness.
The dimensioning of the main load-bearing structure, the loads exerted on it and the desired/required degree of fire resistance thus ultimately determine the thickness of the covering or coating to be applied.
When applying fire-resistant coatings, the pre-treatment and any required post-treatment of the structure to be treated is extremely important.
For fire resistant coatings the Dutch standard NEN 7878 was applicable. This standard has been withdrawn as per 31-12-2012 and has been replaced by the European standard series 13381.
A possible disadvantage of a fire resistant coating is, that it also needs to be maintained and in case of damage (not inconceivable for example in a pallet storage container by abrasion / impact of forklift trucks / pallets on steel parts) it needs to be touched up immediately.
3. The room-sealing building components must be tested for fire resistance in accordance with NEN 6069 Version 2005 normative Appendix A or higher (or in accordance with the European Norm EN 1364-1/13501-2).
It is also important that the fixing method of e.g. fire resistant panels on the (fire resistant) main load-bearing structure is carried out in accordance with the manufacturer's tested detailing. It needs no further explanation that a building component that has to provide some degree of fire resistance cannot be attached with a plastic or aluminium screw.
The doors of the PGS15 storage facility must be tested in accordance with European standard EN 1364-1 and subsequently classified in accordance with European standard EN 13501-2 as EI 1-60.
The above is sufficient and the door construction used must, on the basis of the test carried out in accordance with the aforementioned standard, be suitable for
be suitable for mounting on a steel main frame according to the aforementioned standard (which must therefore again be calculated with regard to the fire resistance as mentioned in points 1 and 2).
Blindly going for "assertions" in an offer is definitely not sufficient even though one should be able to do so "in good faith". In case of substantial price differences between similar products of different suppliers it is certainly recommended to make sure, before making a final purchase, that the aforementioned basic issues are actually met; sooner or later one should be able to prove this to the authorities and the insurance company.
Barneveld, 16 May 2013
Onno de Gruijter
Advisor
(based on a steel main structure).
There are, of course, many ways to make a storage facility fire resistant but four very basic and important points must always be met.
1. All units must be supplied with a structural strength calculation in accordance with the Buildings Decree.
For steel main load-bearing structures, the calculation must at least be made in accordance with the following NEN standards:
- NEN 6702 TGB 1990 Load and Deformations
- NEN 6770 TGB 1990 Steel Structures
- NEN 6771 TGB 1990 Steel Stability
- NEN 6772 TGB 1990 Steel Joints
2. The fire resistance of a steel main load-bearing structure to the failure criterion must be determined in accordance with NEN 6072, the arithmetical determination of the fire resistance of building components, steel structures (or the relevant Eurocodes and European standards).
The calculation should take into account that the steel main load-bearing structure is able to carry the weight of the room-sealing building parts attached to it, for example sandwich panels and/or doors, in case of a fire load "from the inside" and in case of a fire load "from the outside" during at least 60 minutes and will not collapse.
If the main load-bearing structure must also carry the total weight of pallets and/or IBCs in storage, then this load must also be included in the calculation.
A manufacturer may choose to achieve a certain level of fire resistance on the "failure" criterion:
- overdimain a main supporting structure,
- provide a main supporting structure with a fire resistant covering , or
- a main supporting structure with a fire resistant coating.
With regard to fire resistant cladding and/or fire resistant coating of a steel main supporting structure there are a number of issues that need to be known and calculated in advance.
These include the steel profiles used (the required thickness of a coating can differ for each profile), the number of sides that can come into direct contact with the heating source and the environment or situation (loads!) in which the construction will be placed.
There is therefore a precise relationship, provable by calculation, between the load on the main load-bearing structure, the steel section sizes/thicknesses to be chosen for this and the thicknesses of a fire resistant covering or the coating method and the coating thickness.
The dimensioning of the main load-bearing structure, the loads exerted on it and the desired/required degree of fire resistance thus ultimately determine the thickness of the covering or coating to be applied.
When applying fire-resistant coatings, the pre-treatment and any required post-treatment of the structure to be treated is extremely important.
For fire resistant coatings the Dutch standard NEN 7878 was applicable. This standard has been withdrawn as per 31-12-2012 and has been replaced by the European standard series 13381.
A possible disadvantage of a fire resistant coating is, that it also needs to be maintained and in case of damage (not inconceivable for example in a pallet storage container by abrasion / impact of forklift trucks / pallets on steel parts) it needs to be touched up immediately.
3. The room-sealing building components must be tested for fire resistance in accordance with NEN 6069 Version 2005 normative Appendix A or higher (or in accordance with the European Norm EN 1364-1/13501-2).
It is also important that the fixing method of e.g. fire resistant panels on the (fire resistant) main load-bearing structure is carried out in accordance with the manufacturer's tested detailing. It needs no further explanation that a building component that has to provide some degree of fire resistance cannot be attached with a plastic or aluminium screw.
The doors of the PGS15 storage facility must be tested in accordance with European standard EN 1364-1 and subsequently classified in accordance with European standard EN 13501-2 as EI 1-60.
The above is sufficient and the door construction used must, on the basis of the test carried out in accordance with the aforementioned standard, be suitable for
be suitable for mounting on a steel main frame according to the aforementioned standard (which must therefore again be calculated with regard to the fire resistance as mentioned in points 1 and 2).
Blindly going for "assertions" in an offer is definitely not sufficient even though one should be able to do so "in good faith". In case of substantial price differences between similar products of different suppliers it is certainly recommended to make sure, before making a final purchase, that the aforementioned basic issues are actually met; sooner or later one should be able to prove this to the authorities and the insurance company.
Barneveld, 16 May 2013
Onno de Gruijter
Advisor
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