false floor

i am going to do a false floor in the bed of my truck. By that i mean making a floor that will attach to the front wall of the bed on a hinge and raise up. Any of you guys ever done this? its the same idea behind a tonneau cover on top of the bed that raises up. I am thinking that i need to use a heavy duty piano style hinge. I am however unsure how to mount the hinge to the front wall of the bed. I.E. should the hinge be welded directly to the bed wall. looking like a backwards "L" or should i make a lip that sticks off the bed wall and have the hinge mount flat? i am going to sheet metal the inside of the bed and I have braced the front bed wall very well probably overkill. advice? pictures?

depending on how thick it is you could use a light weight hood hinge so that it it hidden

i was thinking of using this hinge but i am still brainstorming.

http://cgi.ebay.com/28-inch-Heavy-Duty-Steel-Piano-Hinges_W0QQitemZ7605016502QQcategoryZ1267QQrdZ1QQcmdZViewItem

maybe not that exact hinge but one similiar

MAKE SURE TO BRACE THE FRONT WALL. LIKE RUN A PIECE OF SQUARE TUBE FROM SIDE TO SIDE TO MOUNT THE HINGES TO. TYPE OF HINGE ALL DEPENDS ON THE WEIGHT THAT IT HAS TO HOLD

BTW USE A HINGE THAT CAN BE TAKING APART. LIKE A DOOR HINGE OR SOMETHING WITH A PIN. WELL BE A HELL OF A LO EASIER TO TAKE IT PART

Here is a hinge for ya...http://www.trickmarine.net/productdetail.cfm?productid=756I can give you a better deal than that on it too Just ask for Heath

Northern Tool has this thing:

http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200306307_200306307

I've used it a couple times on various stuff, if you lay it on its side and have it fold up it gives good lft room also

Check out Brandts truck from Graphic Disorder...he did the same thing.

that northern tool thing looks like a possibility. where would i find pics of brandts truck ?