A post is not a rail. Rails, as understood here, is a side board that
runs from each head board post to the corresponding foot board post.
The dovetailed box may be nice and nice looking, but it sure seems to
be overkill, as for stability. And attaching the side rails and posts
to one another (if that is the case), and they, in turn, attached to
the boxing, is again overkill. Doweling is plenty enough jointery, if
done correctly, for the structural integrity of a doll bed, with or
without the initial box that you make.
If I may, try this:
Eliminate the dovetailed box all together, or improvise with the
attaching of your boxing after considering the following. Create
tenons on the rail ends to insert into a mortise in the posts. This is
plenty enough jointery for your needs, there, and pinning the tenons,
with 2 small dowels for each tenon, will be extra security. For the
head and foot boards, they can be doweled or mortised and tenoned to
the posts. Below each the head and foot boards, add a dadoed or "L"
shaped (rabetted) stretcher, again M&T joint, with the lateral aspect
of the "L" pointing toward the interior of the bed. The stretchers
will add enough strength and more security to the stability of your bed
without having to rely on your original boxing. Slats can be placed in
the interior of the bed frame, for supporting the bedding material
(mattress, blankets, etc) and doll. Thin slats are plenty enough
support for the bedding material, doll, etc., and the slats can simply
rest in/on the dadoed or rabbetted stretchers below the head and foot
boards. For more stability, the slats can simply be glued in place
and/or attached in position with a few small brads .... Isn't that
Use a router (or sand, carve, bevel) to knock off the top, sharp edges
of your side rails.
Also, for some spice, I've recycled (salvaged) small balusters for doll
bed posts. Purchasing turned posts (table legs or newel posts) is an
option also. Have you tried making doll rockers? Those babies love
them, also, and will love you more, too, for that extra effort. I can
email you some pics, if you like.
Hope this helps.