The track size for ordinary single and double doors should be twice the size of the door opening
The track size of the bypass double track double door should be 1.5 or 2 times the door opening. For a track that is 1.5 times longer, the two doors should overlap and open on one side. The track size of 2 times can be opened on both sides.
The track size of the bypass double track double door should be 1.5 or 2 times the door opening. For a track that is 1.5 times longer, the two doors should overlap and open on one side. The track size of 2 times can be opened on both sides.