LumberJocks

Advice about upcoming project

  • Advertise with us

« back to Designing Woodworking Projects forum

Forum topic by BenI posted 194 days ago 865 views 0 times favorited 20 replies Add to Favorites Watch
View BenI's profile

BenI

323 posts in 783 days


194 days ago

Hi all,

My pastor recently came to me asking about making a case to hold amps in and I’ve been trying to come up with a design that will work. It will basically just be two sides, top and bottom with some pieces going across to keep it from racking. The main problem is he said that fully loaded it could be 50-60 lbs. so it definitely has to be strong. My initial plan is have the sides join into the top and bottom boards with sliding dovetails but I’ve never used them before so wanted to check and make sure I do it right.

One of my main concerns is that if I have the sides meet the bottom and top how much space should I allow between the end of the bottom board and the dovetail of the side?? (this distance is labeled in the picture) Also will this joint be strong enough by itself to hold that much weight??

I’m afraid that I won’t leave enough room between that space and the outer side of the joint will blow out sooner or later. Brackets are screwed into the front of the sides and them the amps are attached to that.

Thanks in advance for all the help! Just let me know if you need more details.

-- Ben from IL


20 replies so far

View DocSavage45's profile

DocSavage45

4759 posts in 1447 days


#1 posted 194 days ago

Dado shelving to add strength. Cut an inset for a back panel. Always keep in mind expansion and contraction of wood in your build. If it must be open use a framing strip on the top and under the first shelf with add strength, give it some nice lines, and reduce wracking from side to side.

-- Cau Haus Designs, Thomas J. Tieffenbacher

View SCOTSMAN's profile

SCOTSMAN

5281 posts in 2189 days


#2 posted 194 days ago

Why are you using sliding dovetails? If you do decide to do this then leave at least 40mm or one and a half inches imho.I would make it using plywood which is strong amplifiers take quite a bit of a beating sometimes when on stage.Alistair ps wait for others to chip in with ideas before making your mind up.

-- excuse my typing as I have a form of parkinsons disease

View BenI's profile

BenI

323 posts in 783 days


#3 posted 194 days ago

Doc – there actually isn’t any need for any shelves because they can be ‘stacked’ when attached to the mounting brackets but I was planning on putting the back part in a rabbet along the back.

Scotsman – Mainly using sliding dovetails to try something new and for strength, don’t want it coming apart. I believe they’re for pre-amps, I’m not a musician so no idea what that means but that they’ll be a couple of them in it at once.

-- Ben from IL

View hobby1's profile

hobby1

275 posts in 902 days


#4 posted 194 days ago

dovetail joint like that will break easiily in that kind of hefty situation, the dovetail is good for sides assembly but not for bottom assembly with that much weight.

View wseand's profile

wseand

2116 posts in 1646 days


#5 posted 194 days ago

I wouldn’t use sliding dovetail. I would use something like my crude drawing. It will add a lot more gluing surface and stability. I would also add some sort of face frame to tie them all together. as well I would add some sort of back onto it even if it’s not completely covering the back something to hold it all together

-- Bill - "Freedom flies in your heart like an Eagle" Audie Murphy

View BenI's profile

BenI

323 posts in 783 days


#6 posted 194 days ago

Thanks for all the quick replies!

Hobby- The weight of the amps will be on the sides because of how the brackets attach but it does make sense.

wseand – I was planning on using solid wood so I wouldn’t have to do any edge banding or bother with a face frame but I have thought about corner bracing to make it a little more sturdy. In your drawing the top (and bottom) would fit into a groove in the sides, correct?

Hopefully this question isn’t as stupid as I might think it is…

The grain should go ‘around’ the case not front to back right??

-- Ben from IL

View DocSavage45's profile

DocSavage45

4759 posts in 1447 days


#7 posted 194 days ago

No stupid questions! Always horizontal grain patters, Matching if possible. KISS! I have to remember this….LOL

-- Cau Haus Designs, Thomas J. Tieffenbacher

View BenI's profile

BenI

323 posts in 783 days


#8 posted 194 days ago

Haha thanks for understanding Doc. I thought so since the strength is along its grain but wanted to check.

-- Ben from IL

View levan's profile

levan

397 posts in 1584 days


#9 posted 194 days ago

How large is this to be. Can you put a back on it.

-- Lynn "If you think you can do a thing or think you can't do a thing, you're right". Henry Ford

View BenI's profile

BenI

323 posts in 783 days


#10 posted 194 days ago

I don’t know the exact dimensions yet (should find out tomorrow) but roughly 12” in each dimension give or take a few. However, I need to allow access in the back for wires and the fans so I can’t have the whole back cover back I will have some of it covered.

-- Ben from IL

View BenI's profile

BenI

323 posts in 783 days


#11 posted 193 days ago

Can anyone chime in on what wseand picture was showing as to whether the top and bottom would fit into the sides or the sides would fit into the top and bottom??

I’ve been trying to see which way he meant to have the design and it seems like either way could work.

-- Ben from IL

View Clint Searl's profile

Clint Searl

1396 posts in 966 days


#12 posted 193 days ago

Dovetails ain’t smart. What’s wrong with screws and glue?

-- Clint Searl.............We deserve what we tolerate

View 404 - Not Found's profile

404 - Not Found

2544 posts in 1573 days


#13 posted 193 days ago

Make it from veneered ply with pocket screws and glue. Very strong for this type of application.

View DocSavage45's profile

DocSavage45

4759 posts in 1447 days


#14 posted 193 days ago

Not sure of the vision here. Or the materials?

Do you have a concept in mind? Corner braces are good for rigidity. Using edging can be decorative and functional. Fans for cooling the amps?

If you use a shelf with a dado then the downward weight would also add strength and rigidity.

Looks like a sliding dovetail is overkill here?

Good luck. Make a scale model for concept and practice.

-- Cau Haus Designs, Thomas J. Tieffenbacher

View GOOD LUCK TO ALL's profile

GOOD LUCK TO ALL

418 posts in 332 days


#15 posted 193 days ago

showing 1 through 15 of 20 replies

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase