Looks like you're heading done a good road. Nice work so far! That looks like what we call 9 x 3/4" expanded, and that is what most use for the cooking grates. As for the, as you said "basket of coal", the type of cooker makes a difference on that. I'm not sure by the picture what your plans are for an fire box or if the coal is going under the cooking grate. If it is going to be an offset FB then there should be a very strong frame for the basket with the expanded being used the keep the coal in the basket. This is because the fire in that type of cooker will burn hotter than say putting the fire under the cooking grate, where you would need to try to keep the fire at a very low heat level.
Keep up the good work.
Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........
In the picture of your CC the hinges share the same pin. If you take that pin out and use a bolt with a locking nut on it, it should free it up some. Since you use three piece hinges, that do the trick.
jm2cw
Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........
Yes now use an lock nut without nylon. I use the shortest bolts I can or cut off the extra after placing the nut. And just run the nut down to the hinge don't tighten it at all.
Making memories.
Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........