My vote would be c channel (ON EDGE) the same as a lot of ( home made) truck and trailer decks are built.


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I would use square if your putting in self tapping screws c channel is tough to get screws in sometimes and it looks better from below

 

Above is correct^^^[emoji106]

But I still like channel for outside applications as less chance of condensation and rust especially when used horizontally.

 

Well I would put a angle on the lip on the end put anchor bolts into the wall so the angle iron is holding the weight versus the bolts. Weld the square tubing in then if I was fixing the room below I would tack pipe in for electrical wiring and tack my electrical boxes in for light fixtures . Put the plywood down screw it

 

Electric is coming through the brick wall. Just haven't gotten to it yet. lol no floor.

Actually after thinking about it more I know I said square tubing but in all actuality rectangular tubing would be better

I may go with this with C channel as outside frame. I'd be able to weld all the way around, so no rust in my lifetime.....

I'd stick with channel on edge.

The channel will lent support to doing a 2nd floor above the studio that this first room will create.

Above is correct^^^[emoji106]

But I still like channel for outside applications as less chance of condensation and rust especially when used horizontally.

The RSD is real active at the moment, so I'm not able to do much of anything. But I do appreciate the advice from everyone as it's helping me get it designed in my head, before I go to AUTOCAD.

 

Actually after thinking about it more I know I said square tubing but in all actuality rectangular tubing would be better

 

I'd stick with channel on edge.

 

I would use channel.

I use tubing for gates, tabled and for some types main frames on trailer where do not to twist.

If build a hangar door that has 4 point support I use channel or press form this is so door flex's with building so stays on tracks.
Most do not know how must a steel building flexes from wind and earthquakes.

Three point support back to tubing so door opens and close right.

Basically there time place for flex and a place for no flex.

Dave

Hello again guys, from Peru.
My next welding project is building the support for a plywood floor. It measures 10'10"x7'10".
View attachment 1717123
It has a lip on the the 2 sides with brick (cement fascia), so I'll be bolting through the brick. The room that it will create will be used as an 'art and crafts studio' and a space for building RCA. It will be a storage area until I get the finished floor poured in the shop with the reinforcement.

I intend to build the same type of structure for the roof, to create a storage room above it. So, should I use C channel or tubing? The idea I have is to run the 7'10" sections across to the log run, with short sections between them. I'll be attaching the plywood with screws.

As you can see at the doorway, I have a little bit more than the thickness of a brick in space to fill. Yes, I use to be a Contractor in FL, home construction, so this is new to me. Everything down here is completely cement, rebar and brick. At least in Lima. There in the States, we all know it's wood, unless it's big commercial.

Any help in which metal would be best and size is greatly appreciated.

 

...should I use C channel or tubing?...[/SIZE]

Generally structural steel is sold by the pound. The most efficient shape for a beam is I-beam. So that would give you the least deflection per pound (per dollar) of material, if it is readily available and similarly priced..

 

Typically you have a engineer do Calcs in some cases 120 pounds per square foot and other time 200 per square foot it can go higher for live load.

Dave

Hello again guys, from Peru.
My next welding project is building the support for a plywood floor. It measures 10'10"x7'10".
View attachment 1717123
It has a lip on the the 2 sides with brick (cement fascia), so I'll be bolting through the brick. The room that it will create will be used as an 'art and crafts studio' and a space for building RCA. It will be a storage area until I get the finished floor poured in the shop with the reinforcement.

I intend to build the same type of structure for the roof, to create a storage room above it. So, should I use C channel or tubing? The idea I have is to run the 7'10" sections across to the log run, with short sections between them. I'll be attaching the plywood with screws.

As you can see at the doorway, I have a little bit more than the thickness of a brick in space to fill. Yes, I use to be a Contractor in FL, home construction, so this is new to me. Everything down here is completely cement, rebar and brick. At least in Lima. There in the States, we all know it's wood, unless it's big commercial.

Any help in which metal would be best and size is greatly appreciated.

 

Hello again guys, from Peru.
.... Everything down here is completely cement, rebar and brick. At least in Lima. There in the States, we all know it's wood, unless it's big commercial....

I love this statement....

I am from Spain and here everything is also built solid. I went for a whole year to the US as an exchange student and I remember that the only thing concrete in my foster parents house was the basement walls. Everything else was wood. But not the log-cabin-solid-as-heck-wood...

Keep up the good work! Seems great from here.

Mikel