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The objective of this study was to investigate the effects of material type, screw diameter, and screw length on ultimate failure load and stiffness of four-sided furniture cabinets. In total, 81 four-sided test cabinets were constructed in 1/1 dimensions. Assembly of cabinets was done using nine different sizes of screws ranging from 3.5 by 40 mm to 5 by 50 mm. Panel materials were 18-mm-thick particleboard (PB) and 16- and 18-mm-thick medium-density fiberboard (MDF1, MDF2). Cabinets were anchored at two points located underneath the top panel and tested under static load. Loading procedures of the American National Standards Institute/Kitchen Cabinet Manufacturers Association were followed during the static tests. Test results showed that 18- and 16-mm MDF cabinets yielded higher failure loads and stiffness values compared with the 18-mm PB cabinets. Test results also indicated that increasing either screw diameter or screw length tended to have a positive effect on the failure load and stiffness values. The strongest and most rigid four-sided cabinets were obtained with 4-mm-diameter and 50-mm-long screws if the construction panel material was 18-mm-thick MDF, 5-mm-diameter and 45-mm-long screws if the construction panel material was 16-mm-thick MDF, and 5-mm-diameter and 50-mm-long screws if the construction panel material was 18-mm-thick PB.

Brass materials are widely used as engineering materials in industry because of their high strength, high corrosion resistance, and high electrical and thermal conductivity. They are easily shaped and they possess a pleasant appearance. However, it is difficult to weld brasses. The main problem with these alloys in fusion welding is the evaporation of zinc during the welding process. After welding, the weld metal becomes porous. Moreover, since the amount of zinc in the alloy is reduced due to evaporation, the brass material loses the physical and chemical properties which it normally possesses. Studies on weldability of brass materials are very few. There is very little information concerning the weldability of brass materials in the literature and general definitions are often seen. It is impossible to find studies on experimental investigations of the welding of brass materials apart for a few exceptions. There are virtually no studies to support experimental data about whether welding of brass materials is possible. The purpose of the present study is to determine suitable parameters by investigating the weldability of brass materials, and the difficulties involved. In order to enable low and controlled heat input into the welding bead, TIG pulse welding is used during experimental studies. The physical and chemical properties of welding beads (penetration, tensile strength, Erichsen deep drawing value, chemical composition of internal structure) have been determined and evaluations have been made. STWJ/394

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