Statistical selection models showed that the optimal combination of factors based on the joint study was: dado joint, ethylene vinyl acetate adhesive, no staples, and room temperature conditions.
The three joint configurations included a face to edge dado joint, a face to edge butt joint, and an edge to edge butt joint as shown in Figure 1.
For the face to edge dado joint, the area was calculated as the cross-sectional area of the side member (1/2 by 4-1/2 in.
The results show that the face to edge dado joint had lower average values for all adhesive types than the face to edge and edge to edge butt joints.
The face to edge dado joint failed due to the reduction in cross-sectional area in the back member.
05 showed that the dado joint had the best performance followed by the butt joint.
All of the cabinets were constructed with a dado joint configuration, EVA adhesive, without the use of staples.
Cabinet C2 likely had better performance because of the dado joint that connected the side panel and the back rail.
From the present study, it can be concluded that using a dado joint to join the back panel to the side panels is the best method of construction for a cabinet.
In this type of failure, the part of the rail forming the dado joint separated from the side panel.
The improved performance is attributed to the dado joint used in the laboratory cabinets as compared to the rabbet joint used in some stock cabinets.