What is the difference between the main shelf and the auxiliary shelf? Why is the price so different?
A number of shelves are joined together, each row shelf needs only one main frame, and the rest is an auxiliary frame. If the site permits, the middle of the continuous open, then the main and secondary shelves can be indefinitely connected. How many main shelves are there in the shelf? How many rows can be divided into?Therefore, the main frame is more expensive than the subframe.
It can be seen that the main frame refers to the two column piece (sub frame only one column piece), two beams, if the two shelf is two plates, if it is the three layer shelves is three pieces of plates, if it is the four layer shelves are four laminate plates etc..The main frame can be used alone, moving, and the subframe can not be used or moved alone. It needs to be connected and used with other shelves of the same type and model.
In the shelf industry, according to the usual practice, the gold shelves are mainly divided into the main frame and the auxiliary frame. Because the general post modern shelf can be shared, namely, such as two sets of shelves, together with each other, then the first shelf, both sides need to post, can be used independently, called the main frame, connected with the second shelves, one side columns do not need to use, directly installed in the first post on the shelves, only side pillars, called sub frame.
