3 - 2x6 Boards 10' feet long
1 - 4x4 Post 32" inches to 40" inches long
1- 2x4 Stud
12 - Hex Bolts 3/8 by 6" inches long
12 - Hex 3/8 Nuts
24 - Cut Washers for 3/8 Bolts
1 - 2x4 Stud framing support bracket (pictured)
8 - Screws; 1 1/2" inches
Miter Saw (Recommended)
Electric Drill with Phillips Drill Bit
Long 3/8 Drill bit (6" inches or over)
1- 9/16 Socket Wrench
1- 9/16 Wrench
Step 1: Making Legs
Cut 8" in length if you want castors on it, 10" if you do not. You may opt for shorter legs (no shorter than 6.5") or longer ones.
Step 2: Cut your Head/Foot and Side Boards
Mattress Size: Long Side Board Cut: Short Head/Foot Board Cut:
Twin two 75" boards (or 76") two 39" boards (or 40")
Full two 75" boards (or 76") two 54" boards (or 55")
Queen two 60" boards (or 61") two 80" boards (or 81")
King two 76"/78" boards (Kings varies) two 80" boards or (81")
My particular platform bed is Full Size. There's a popular quote in carpentry that goes as "Measure twice, Cut once". Be careful with your measurements. From this point on, there will be more measurements needed and I recommend a Carpenter's Square for straight and even lines to cut from ($2.99 yellow plastic tool pictured above)
Step 3: Attach short boards to legs
For your short (head/foot) side boards you want the edge of the legs and board to even out, as shown in picture above. Remember to maintain a 1/2" inch gap. See previous picture #2.
Step 4: Attaching Long Side to Bed
Next, make measurements to locate where the first hole is on the leg and draw an "avoid line" on the board, just for reference. If you measure from the top of the leg, remember to account for the 1/2" gap. Draw a line 3" inches from the edge because you will be drilling 3" away from the edge into center of the leg.
With your "avoid line" and by the 3" inch mark, drill a hole and insert a bolt between 1 1/4" to 1 1/2"inches from the top and another one 1 1/3" to 2" inches from the bottom.
Step 5: Install Center Support Beam
Installing the center support beam for the platform bed, begin by marking the very center of both sides (head/foot side) of this bed. Also mark for our 1/2" inch gap to find where the 2x4 support stud beam should go.
Then trace lines around where you want to install the 2x4 Stud support bracket and disassembly your platform bed so you can drill on screws better and hammer in some built in notch on the support bracket.
Do the same for the opposite side, then measure the length from that stud support bracket to the other support bracket on the other side and cut a 2x4 stud of that length. That measurement should be within an inch or two of the length of your mattress size.
Step 6: Glue/Nail on Support Rail
Note: If you select a wood strip support system instead of plywood, make your support rail the entire length of the side boards. You can't afford gaps with a wood strip support system.
Step 7: Install Castors, Cut Plywood, Tighten and Enjoy!
You must already know we're almost done here! The last thing to do is get some support for the mattress and you. I am using plywood because they're still light and won't buckle too much as a wood strip support system might. Measure the sideways length of the inside right above on top of your new support rails and cut sheets of plywood of that size. I made two sheets of plywood with their standard width but the third sheet I had to cut to fit.