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Hello Gents. Could you please explain me the key differences between SG4:15 and SG4:20? We've got a presentation about the new guidance but I couldn't catch any significant changes with the previous...

My name is samir

i have some questions regarding the 3 meters unit beams with bolts and i do not know where i can get more information about some details such as:
What is the maximum length that...

I can not find anywhere the information about the maximum length that unit beams can be spliced.i mean 3 meters unit beams with bolts.as far as i know,their total length must not exeed 9 meters.is...