What type of channel steel and I-beam should be used to build an attic floor? Thank you!
1.16 channel steel is feasible plan, but channel used to do horizontal keel, you can open a little distance, 1 meters, 2 to 1 meters, 6 can be, and then spacing 400 with L50 or L60 angle steel connection can be. Do you have wood or steel plates to see what you're going to do upstairs?. 20 I-beam is really not necessary.2., if you use I-beam, you can directly slotted in the wall, and then inserted into the wall after the fixed, you can also use expansion bolts fixed channel, after the wall and then overlap I-beam, full welding.3. with 20 I-beam, the distance can be controlled to 1.6 meters. With channel, then the spacing to control 1.2 meters more appropriate, the middle should use angle steel to do cross brace.
When the channel is fixed, the expansion bolt is used to see what the wall is. The casting can be expanded directly on the wall or fixed by the chemical bolts, and the brick wall needs slotting.
4.5 meters wide, certainly not wooden side. If you use wood, you will regret it in the future. 4.5 meters wide with wooden square, unless there is an upright post in the middle, otherwise it will surely fall. This is not a ceiling. If you use wood, you can only use more than 20 cm of raw wood through. I used to do an attic, the width of the room is 3.6 meters, all of the diameter of about 20 of the original wood, and later used basically do not shake, you can have this room nearly 1 meters wide oh.
