Here's a couple of shots on how I modeled up the fire escapes:
The basic sheet of Darico is 70 cents, is available in a wide variety of colors and most craft supply shops carry it or a version of it.
First we have the basic layout pieces cut but not trimmed. Trimming is done with scissors. Bars are created by drawing a Xacto or other really shape blade through the cross bars. Practice will make this a very quick process.
Flip the trimmed pieces over and check the backs to see if the blade left any really bad appearing chunks untrimmed.
Here's a shot of where I have flipped and trimmed all sides as well as I want with out cutting to much...
So now your going to prepare to hot glue the pieces together. Hot glue and slick rubbery plastic are not friends to each other.... So... I apply a very thin amount to all 4 the base platform rail sides and then use the side of the hot glue gun snout to run the edge of the platform across to really smear it on the leading edges, then set aside and repeat on the side wall pieces, though I did not smear the top "hand rail" side. This wiping effect makes sure the hot glue is
A: Thinly applied
B: the front, upper front edge and bottom edge of the plastic bar is now coated.
C: the smearing it on the hot snout of the gun prevents it from cooling to quickly
The rest of it all is here:
http://armoredink.blogspot.com/2013/05/fire-escapes-101-how-to.html