Function and type of perforated keel; Is there a keel in the partition? What is it like? Have you got any pictures? Please ~ ~ ~
There are three kinds of light steel joists for partition walls: horizontal joists (heaven and earth joists), vertical joists, through-hole joists and fittings support cards.
The function of piercing keel is to connect the vertical dragon into a whole through the support card and increase the overall strength. The specification is 38.