The soul of the sofas Delta lounges, or drums, are made of top quality wood and are tested for strength and stability tests. Based on the modeling, also steel and aluminum enter into the construction of load-bearing structures, in combination with the polyurethane foam and to the foam. To ensure a uniform resistance to weight stress, the stem with elastic straps to weave separate seating and backrests. In some models, instead of belts or in combination with them are utlizzate steel springs that conferiscpno great resisitenza and consistency of sitting.
The frames of the seats, which are subject to higher loads, are made from interlocking bands and reinforcing corner shaped elements, which make them firm and sturdy. On the sessions frames are stretched the elastic straps from 7cm to support the pillows and ensure adequate suspension, balanced to the general comfort of the lounge. The straps are crossed with each other through a mixed process of manual dexterity and meccanicit with a same degree of tension to ensure a greater homogeneity in the distribution of weight.