As a single mom of a large household I have learned how to fix repair and screw up all kinds of things as a do it yourselfer. Not as a preference but as a financial consideration. So... I am having a new front door and picture window installed in the face of my house, by a professional. however .... there is a flip flop of placement the window is going where the door currently is and the door is becoming more centered and being placed where the window currently is. It is my job to tear down the current artic entry, which is almost complete, and get the grounds ready for a new larger front porch, simple, 8x24. I am getting a tad bit clever and resoursful at the same time by using the metal spestos pipe that I have just removed, replaced the oil furnace and wood stove with electric so now I am going to use these pipe for the footing for my new porch. did them into the ground and fill them with concrete, then..... what I would appreciate from a wise reader..... and then.... and then.... what I was thinking of was to build a form, plywood on the bottom and 2x4" sides... basically a 8by 24 by 4" sandbox sitting on these metalspestos pillars and then... and then... filler up with concrete to make the porch. since these metal spestos pipes are 8" pipes, meaning of course that is 8" on the inside of the pipe and 11 inches outside .... I would think this would be strong enough to flippen drive a truck over. so the weight of the form willed concrete would not be to heavy. lolol... but I have only ever used concrete to make decrative step stones. I was thinking that with the 2by 4 sides of the form, I would use screws to make sure it was plenny secure and then leave the form intact as part of the porch. In my big picture I want to ad a railing and roof so by leaving the form intact I would have wood to work with. Was that as clear as mud ? lol Please advise.