The three doors of three rails can open one piece, and the three doors of two tracks can only open one door. The opening area of double-track profiles can reach up to 50%, and three rails profiles can reach 66%! This is the main difference! Other differences include stability, number of Open fans, and aesthetics! According to the balcony area, the open space is different. Three doors of three rails can open one piece, and three doors of two tracks can only open one door.
When installing, the thickness of the material can be tested. The thickest part can reach 4.2mm, and the average Wall thickness is over 2.0mm. Personally, I think it is still very good. It has been several years and has not been deformed.
1. If you choose three rails three fans, you can open 2/3 at a time. Lower track will highlight the steps 2cm, the left side of the upper rail will highlight the eaves 8cm, and the right side of the upper rail will highlight the eaves 4.5cm. Lower track can be fixed without aluminum square tube, while the upper rail must be fixed with aluminum square tube.
2. If you choose three rails three fans, you can also separate the upper and lower sections of the railing. There are three rails three fans under the railing, and there are also three rails three fans on the railing. The lowest track stands out by 2.5cm, and the highest track is basically unlikely to come out.
3. If you choose two rails and four fans, you can open 1/2 at a time. Lower track will not stand out. The left side of the upper rail will stand out 4.5cm, and the right side of the upper rail will stand out 2.5cm. The upper rail must be fixed with aluminum square tube.
