Widen your narrow cabinet openings to accommodate larger objects without damaging the cabinet doors or changing their appearance. Install sliding-shelf kits that you purchase, cut to size, and install in your kitchen cabinets for extra storage and easy access to items at the back. The kits join with dove-tailed sides and a tray bottom that is secured with screws.
Remove doors, hardware, and any fixed shelves from the cabinets where you will install roll-out shelves. Temporarily take out drawers above the cabinets because they will obstruct your access.
Attach a strip of oak to the back of the horizontal support before cutting out the vertical supports to widen the cabinet openings. Use a Japanese handsaw to carefully cut the supports without damaging them, because they will be reused.
Position and secure four support rails/pilasters and two partitions for each pair of sliding shelves. The front and rear partitions serve as stubs to hold the rails/posts on the side where there is no wall.
Snap two drawer glides into the rear support rails. Position the post and snap the other end of the glides into the corresponding slot on the front post. Secure with screws.
Make square cuts as necessary to shorten each pair of side components for a pull-out shelf. Do not cut the front and back components because that will remove the dove-tails that join them to the sides.
Cut the panel that forms the bottom of the shelf to the same dimension as the side components. You will be trimming only the length of the panel from front to back--do not change its width.
Brush carpenter's glue on the dove-tails and insert them carefully into the notches of the back component. Repeat for the front component and the other side to form a rectangular frame. Tap the joints gently into place with a mallet.
Brush glue on the bottom edge of the frame and set the bottom in place. Drive screws through the pre-drilled holes to secure it and provide structural rigidity to the shelf.
Secure the mating half of the drawer glides on the left and right sides of each shelf with screws and slide the shelves into the cabinets on top of the glide rails already installed. Line the drawers to prevent slipping.
Position and secure the severed support to the cabinet door to fill the gap where the support was removed. When reattached, the pairs of doors will open and close properly and disguise the cut.