Angle-Iron Lumber Rack
Here is an easy, cheap, and efficient storage rack for lumber. The only cost is for the 4x4s, bolts, and lag screws. Very strong angle iron can be had for nothing if you just scrounge for some discarded bed frames at the local dump—you won’t believe how plentiful they are—or you can purchase it and have it cut to length.
To make the rack, first clamp the 4x4s together and, with a circular saw, cut kerfs 12 in. to 18 in. apart to fit one side of the angle iron. Now lag-bolt the 4x4s to the wall. Cut the angle iron into convenient lengths and drill a hole in each piece for the lag screw that will hold the iron in the slot.
The beauty of this system is that because the angle iron is narrow and no braces are required, there is no wasted space.
Drawing by Jim Richey.