Hello i need to know what should i do, Consider i have a box, top half and bottom half. so now i have to hold the top half and bottom half together with the rubber band then how do i know what rubber band will be enough to exert force so that both parts of box are hold together. also i dont want the box to deform more then 1mm due to rubber band force, from the force gauge i see that it requires 0.067 bar to deform box by 1mm. Also there is a mass in box weighing 5 kg. so now to hold the two box parts with 5 kg mass when i am lifting the box just with the top half of box. How do i select the rubber band? how do i determine the force it should exert on the box to hold it together without deforming box more than 1mm. Rubber band calculations any? Any place i could find any references or formula for something like this. you help is appreciated.