We secured the plywood to the 2 x 3 using 1 screws driven through the plywood into the 2 x 3.
Tongue and groove pine headboard.
For added stability nail a third centered gusset on the backside of the headboard.
Oct 22 2016 headboard with reclaimed wood.
Glue the tongue and groove in place.
Knotty pine tongue and groove for king size bed.
The next step was gluing our tongue and groove t g paneling to the plywood.
Note that the last long slat placed will leave a gap a couple of inches wide near the sub header as shown in image 5.
This way the heads of the screws will be on the backside of the headboard step 2.
Saved by rebecca bezio.
If you have trouble placing the grooves on the tongues of mating parts try using a cutoff of the tongue and groove pine to use as a guide as shown in image 4.
Repeat steps 2 9 to assemble the headboard this time using six 1 x 6 tongue and groove pattern stock boards and marking the line for the bottom rail at 31 inches from the top of the legs.