Heavy duty rack with loading capacity demand up to 2.0 tons per shelf is normally equipment with the stronger and professional Box beam. Loading test is also compulsory even though such kind of beam is equipped on this kind of heavy duty storage rack.
In order to reflect the real deformation on the box beams under the enough load, we normally put load on the shelf over3 days and nights.
Using a tape measure to measure the vertical sag on the middle point of beam so that we can get the real reflection of the beam under load . Then we can determine our design is reasonable, acceptable and safe.
