mitred joints in veneered mdf

[engineer one]

so finally got round to using some of my veneered mdf,

in the alcove the corner joints are not going to be seen, but
it got me thinking.

on the first couple of units, i am going to put a face frame on the front, and
as i say, the sides and top will not be seen on the outside.

but, i have a couple of mobile storage units to make that will have sides
visible occassionally, so i would rather not use screws, and i can of course
use veneer tape, but i thought

i have both a biscuit joiner, and a mafell doweller, but i wondered
whether in these circumstances a 45 degree mitre re-inforced
with one or the other, would be strong enough, or do i need
to use mechanical fixings too.

what i am worried about obviously are the spreading loads as the units
are moved around.
for instance would the lamello metal biscuits work properly.
and be strong enough??

other wise as said before it will be face and top frames, but
as they say why not exploit what you have? :lol: :lol:

paul :wink:

 

[engineer one]

second part, any one remember where the pierced mdf panels for
rad covers comes from, seem to remember a name beginning
with a j, but do tp or any of the other companies stock
same???

paul :wink:

 

[Scrit]

...but, I have a couple of mobile storage units to make that will have sides visible occassionally, so I would rather not use screws, and I can of course use veneer tape, but I thought

I'm not a fan of mitred joints - they can be a b*gg*r to get right in veneered sheet materials and even then they never seem as strong as a dowelled or biscuited butt joint I think because they are always being subjected to some form of shear loading and in the case of a mobile unit will inevitably need to withstand the racking motion as the units are pushed about whilst loaded. I'd only use them if the value of the job warranted it. In any case if you overhang the tops on the mobile units by just a few millimetres you can make a "feature" out of using the butt joint.....

The Lamello metal joints are actually designed for KD assembly and are no stronger than a wooden biscuit - they are however a lot more expensive - stick with the wooden ones as they are more than adequate.

One source of pierced MDF radiator cover is actually B&Q! For fancy stuff there's FMM. And is the "J" you're thinking about Jali by any chance?

Scrit

 

[engineer one]

thanks scrit perfect answer as usual,
jali was who i thought of.

i have to say that i tend at this time to make the tops flush with the
sides, but i can see the value of the overhang, particularly if i put maybe 3 together alonside each other.just have to get my measuring stick out
properly :lol: :lol:

i would have thought though that the racking can be solved by fixing the
mdf back solidly. either in a rebate, or outside with pins.

certainly now have two decent but separate answers. :?

think i will stick with square bits

paul :wink:

 

[jasonB]

You could also try Grilles Direct and Just Grilles for the rad covers.

It's not easy getting a long mitre on veneered board but it can be done.

Jason