Light steel keel ceiling The first main keel distance from the wall should be how much? To be specific.
Under normal circumstances about 30cm on it.
W fixed spacing of the boom 900-10OOmm pitch, in the event of beam and pipe fixed point is greater than the design and procedures requirements, should increase the fixed point of the boom. W is not on the ceiling, boom length is less than 10OOmm, you can use φ6 boom, if more than 10OOmm, should be used φ8 boom, should also set the reverse support. W Master's ceiling, boom length is equal to 10OOmm, you can use φ8 boom, if more than 10OOmm, should be used φ10 boom, one end of the boom with L30X30X3 angle welding (corner of the aperture should be based on boom and expansion Bolt diameter to determine), the other end can be tapped out with more than 100mm screw, you can also buy finished screw welding.
Thirty centimeters This is the standard necessary distance
