In the manufacture of bookcases I made sure that the connection is full to the walls with nails, spikes or corners and base rails with screws is not always provides the strength and rigidity of the structure due to drying of wood, glue, and therefore not very reliable. I think that a more practical way of connecting with full of side walls coupling bolts with nuts, which is shown in the figure. After evenly tightening the screws with a screwdriver the whole structure becomes rigid and rectangular, other compounds to provide very difficult. V. SAFRONOV
Recommend to read
SCREW ON THE CONTROL
When developing propeller systems snowmobiles, trikes, aircraft and model aircraft designer is required to know the exact values of some parameters. And most importantly — the frequency...
IF BROKEN NEEDLE
For pumping nipple balls often use Bicycle pump with a special needle. But it does not matter if it broke or its just not there at hand: with this work well covered by a normal Bicycle...
