THE SOFT OBJECT IMPACT RESISTANCE TEST

In constructions increases significantly the performance of this test to verify the safety of users

The soft object impact resistance test on railings is perhaps one of the tests that creates the most expectation in a construction, surely due to its spectacular nature. It is a type of test that is carried out following the criteria applicable on site of the UNE 85238:91 standard (railings, test methods). From safety the test has a very important function because it simulates the impact or crash of a person against the railing, it must withstand the impact protecting people against a possible fall.

The method consists in subjecting the railing to the shock action represented by the perpendicular fall of a soft object (simulated by means of a bag filled with microspheres) at a height of 1.2m from the point of impact.  A weighing 50kg generating a force at the moment of impact of 600J right at the center of the railing. The railling could be made of glass, steel bars, wood, etc. Conceptually, the principle of conservation of mechanical energy is used, in the transformation of potential energy into kinetic energy when the impact is generated.

From safety the test has a very important function because it simulates the impact or crash of a person against the railing

As specified in the standard, once impacted (and avoiding a second impact caused by the rebound), pieces or elements that could cause injury to people who are outside should not fall, and should prevent the passage of a 250x180mm hexagonal object. The different types of rails make the test result positive or negative depending on multiple factors, such as: composition of the railing, materials used, fixing of the railing, execution of the same, etc.

This test is also carried out on windows, doors and other elements, but other regulations are used and it is usually done in the laboratory or in the factory.