BS EN 15080-12:2011 pdf download

BS EN 15080-12:2011 pdf download.Extended application of results from fire resistance tests Part 12: Load bearing masonry walls.
— thickness of unfilled perpend joints in unpiastered or urwendered walls;
— thickness and type of plaster or render in rendered walls; measurement of applied load on the test specimens;
NOTE The measurement of the temperature aithin the test specimen at least in mid-height across the wall thickness is advised to allow for a future calculation of fire resistances according to EN 1996-1-2 Thermocoi.les should be placed at least in depths of 10 mm, 30 mm and 50 mm from the e3posed side and then every 50 mm.
5 Rules for extended application
5.1 Units
(1) Extrapolations are only possible within the same type of material — e.g. tests on clay unit masorwy with units according to EN 771-1 can only be used for extrapolations for clay unit masonry. For lightweight aggregate concrete units according to EN 771-3 extrapolations are only possible within lightweight aggregate concrete units.
(2) The test results are valid for the tested type of unit. If solid units. i.e. group 1 units according to EN 1996-1-1 are tested, the results are only valid for group 1 units with the same or a smaller percentage of voids.
(3) For verlcally perforated units (group 1. 2 and group 3 according to EN 1996.1.1), the test results can be applied for units with the same or a smaller percentage of voids. If the difference between the tested percentage of voids and the upper limit of the group in EN 1996.1.1 Is less than 5% of the overall surface of the unit, test results are valid for all percentages of voids within that group. The tested percentage of voids can be rounded up to the next multiple of 5%.
(4) For vertically perforated units, the test results can be applied for units with the same or a higher thickness of webs and shels and for the same or higher values of the combined thickness. The value of the combined thickness can be rounded down to the next multiple of 10 mm.
(5) Test results for vertically perforated units can be applied for solid units.
(6) For the classification REI and R the test results are valid for the tested size of the unit and units larger in height, length and width.
(7) For units with a length between 200 mm and 1000 mm. test results for a unit length from that range are valid for the whole range of unit lengths between 200 mm and 1000 mm.
(8) For the classification REI-M. test results are valid for the tested length and width and units larger ii length and width, It is not possible to extrapolate from tests on masonry walls with unit heights equal or smaller than 250 mm to units with greater heights.
(9) For tested wall thicknesses up to 14(1 mm, the test results are valid for masonry with units with the same or a higher declared value of the gross density of the units withii the following ranges.
— unit density between 300 kg/rn3 and 999 kg/m3: Tested density and densities up to 800 kg/rn3 higher than the tested density up to a maxwnum gross dry density of 1600 kg/m3.
— unit density between 1000 kg/rn3 and 2200 kg/m3 Tested density and densities up to 600 kg/rn3 higher than the tested density up to a maximum gross dry density of 2200 kg/m3.
NOTE 1 Extrapolations (or lightweit aggregate concrete units are limited to net dry densities 20 % higher than tested.
5.2 Masonry mortars and joints
(1) For all types of masonry mortar — general purpose mortar, lightweight mortar, thin layer mortar — the test results e valid for mortar compressive strengths equal or higher than tested.
(2) Test results for walls with lightweight mortar with a gross density up to 800 kgfm tested are also valid for walls with lightweight mortars wifh a density higher than tested and for general purpose mortar with a bond strength classification equal or greater than M5 according to EN 998-1:2010.
(3) Test results for walls with lightweight mortar with a gross density> 800 kg!m3 are also valid for general purpose mortar with a bond strength classification equal or greater than M5 according to EN 998-1:2010.
(4) Test results for walls with than layer mortar are valid for all types of than layer mortar and general purpose mortar with a bond strength classification equal or greater than MS according to EN 998.1:2010.
(5) Test results for walls with lightweight mortar and general purpose mortar are valid for walls with thin layer mortar, if the utilisation factor does not exceed the relation between the load in the test and the design resistance for walls with thin layer mortar.
(6) Test results for unpiastered or unrendered walls with unfilled perpend joints are valid for walls with a maximum perpend joint thiclness equal or smaller than tested.
(7) Test results tea- uriplastered or unrendered walls with filled perpend joints are valid independent of the perpend joint thickness.