Build a Loft Bed
Summary: Loft beds are an excellent way to save space in a small dorm room or apartment. The following plan is based on a standard twin mattress, a floor space only 48 inches in width, 78 inches of length and a minimum ceiling height of 8 feet.
Related Articles: Loft Beds - Accessories, 3D Plans - Loft Bed, Building a Loft Bed
DEAR TIM: I have a daughter going off to college and she wants a loft bed constructed in her dorm room. Her room dimensions are 10 feet by 16 feet with windows on the 16 foot wall side. The loft cannot be in front of the windows and there must be a minimum of 3 feet of space from the mattress to the ceiling. Help! There are only 4 weeks until classes begin. Nancy B., Uniontown, OH
DEAR NANCY: Let's see, from the time you wrote your note until the time this column was written we have lost 10 days. You now have just two and one half weeks to plan and build this loft. Relax, it's a piece of cake! If you take your time, your daughter just might have the coolest loft bed in the dorm. Not only that, her room should be spacious because her desk is going to tuck under the loft for a cozy study area. You need to pre-cut and assemble the loft now so that when you take it to the dorm, it will assemble in about 10 minutes.
The plan I use is based upon a person sleeping on a standard twin sized mattress. These generally measure 38 inches wide by 76 inches long and are about 8 inches thick. Many colleges provide mattresses for dorm rooms. Make sure you determine the dimensions before you start this project.
The materials required to construct the loft consist of: 1 piece of 4 by 8 by 3/4 inch thick A/C plywood, four 4x4 by 8 feet long construction heart redwood or regular pine posts, three regular lumber 2x6x8's, three 1-inch thick by 3.5-inch wide by 8-foot long finished lumber boards and some assorted lag bolts and screws. The bolts and screws allow for easy assembly and disassembly. Nails should not be used to connect any of the pieces of lumber. Avoid using treated lumber for this project, as it is a good idea to minimize contact with the chemicals used in the treating process.
The loft portion of the bed is going to consist of a simple rectangle box made from the 2x6 lumber. This box is then covered with the custom cut piece of plywood. I prefer to make the loft platform so that there is just one inch of extra space around each side of the mattress. The mattress lays on top of the plywood-covered box you are about to make. Check to make sure the mattress you are going to use measures 38 x 76 inches. If so, then you should cut two of the 2x6's to a length of 78 inches.
Cut the remaining 2x6 into two pieces that measure 37 inches long. The long pieces overlap the short pieces at each corner so that you end up with a box that measures 40 inches by 78 inches and is five and one half inches tall. Use three 3 inch long drywall screws to connect the 2x6's to one another at each corner. Cut the piece of plywood to fit the box and use 1 and 5/8 inch drywall screws spaced at 2 foot intervals to connect the plywood to the 2 x 6 rectangular box.
Check to make sure that all of the 4x4 posts are the same length. Lay them on the ground side by side and measure down from one end 44 inches. Use a square across the group of posts and draw a line. This line on each post represents the point where the top of the loft platform must stop so that you maintain the 3 foot ceiling clearance.
Position two posts so that the outer edges are parallel and spaced 78 inches apart. Have your daughter help you tilt the platform up onto the posts so that the top surface of the plywood is just touching the line on each post. Drill two one quarter inch diameter holes through each 2x6 and half way into the center of the 4x4 posts. Attach the platform to the posts using 4 inch long 3/8 inch diameter lag bolts. Do the exact same thing with the other two posts and your loft bed is now complete.
To get up and down from the loft area, you will need to construct a ladder. Use the one inch thick lumber to make a ladder similar to those found on a ship or a fire escape. These have level treads spaced at 10 to 12 inch intervals and are often set at a fairly steep 60 degree angle. Once the ladder is built, attach it to the loft platform with screws so that it will not fall away as your daughter moves up and down from the loft. Be sure to take all of your tools with you in case minor adjustments have to be made at the dorm.
Author's Notes:
Received this picture and the following email from Dona Lopez, TX.
"Well it's not really a question, I used your instructions for the loft bed for a "While you were out" style Christmas surprise for my daughter, and I wanted to share the results with you.
I customized it a bit with a desk and a different type of ladder system due to extremely limited floor space, her room is about 10 x 10.
I'm a mom with basic woodworking skills, did it all in three days with only my 20 month old son to help (he's a whiz with the cordless drill lol)!
Thanks so much for the instructions, my daughter was completely floored! By the way the green was her idea!
Thanks again,"
Dona Lopez
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Comments:
Brandy Womack 24 Nov 2007, 01:07
Hey there... I'm gonna build this tomorrow for my son who wants a "fort" in
his bedroom. One quick question... the bed is 78".. You say cut the 2 by
6s to 78" and that the long pieces overlap the shorter in the "box"
assembly, yes? Wouldn't the thickness of the shorter boards decrease the
true bed length, then, by a total of 4", losing 2" on either side? And if
the bed width is 38", but the width of the box boards is 37", how is there
the one inch space you describe? Help??? Am I crazy?
Brandy Womack 24 Nov 2007, 01:40
I am an idiot. Just did some research... who knew? Shrinkage? I hate the
customary system. Bleh... Sorry 'bout that, Tim. Gotta start somewhere,
eh?
ATB 24 Nov 2007, 07:06
Brandy,
No idiots visit AsktheBuilder.com. I think the confusion was caused by the last eclipse. Glad you stopped by and were able to figure it out. Did you see the other Loft Bed article that has the 3D illustrations?
Dan 31 Dec 2007, 18:37
Bill,
Maybe I'm missing something but it seems to me that if the bed is 38" wide and you cut the end pieces of the box 37", the bed is not going to fit.
AsktheBuilder 31 Dec 2007, 19:30
Dan,
Read it again, the math is correct.
Dan 01 Jan 2008, 02:38
Bill,
I did read it again and I'm still confused. The way I read your directions, if you cut the end pieces 37 inches and overlap the side pieces (1.5 inches width for each 2x6 for a total of 3 extra inches) you get an exterior width of 40 inches (as your article indicated). However, if I took my single bed, which is 38 inches wide, and put a 2x6 on each side of it, the total width would be 41 inches. Doesn't the inside of the box have to be more than 38 inches for the bed to fit?
AsktheBuilder 01 Jan 2008, 06:50
Dan,
The 2x6s are like floor joists. They are covered by the plywood. The mattress lays on *top* of the plywood, not inside the box. I think you feel the mattress sits down inside the upsidedown box. If that is what you want, then you must make the short 2x6s longer.
tony 05 Jan 2008, 22:51
i have a condo that has a wall dividing the 460sq room. I would like to
build loft bed with stairs and put a bed on top. what are some of my
choices.
AsktheBuilder 06 Jan 2008, 11:00
Tony,
This is just one of a series of my columns on loft beds. Read all of what I have written and let your imagination run wild.
Lisa 29 Jan 2008, 08:17
Do you have a plan for a king size loft bed. My son is wants a loft bed
but he is a big boy and needs a bigger bed.
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