To hold the stacked pallets in a fixed place may be a challenge! No need to worry even a little bit about it as there are many how-to tips we are to share with you! Use of glue will be remarkable for adhesive demands but the main assemblage of heavier pallet boards can easily be done using metal brackets or steel plates! Angle iron would also be supporting to hold tightly the backrests in just vertical upright positions!
For a secret and hidden assembly of pallets, pocket holes can also be made in each two installed pallets and just put the screws in for a lasting grip! Nuts and bolts formulation may not work properly in this case as it is hard to find a nice target to put the bolts in, the hollow spacing in between the pallets gives just no way to add nuts and bolts! Use of angled iron brackets and steel plates with screws would be rocking to fix the pallet boards in exactly right positions!