The color coated steel plate is a steel plate with an organic coating, which has the characteristics of good corrosion resistance, bright color, beautiful appearance, convenient processing and forming, and the original strength of the steel plate, and the cost is low. The substrate of the color coated steel sheet is a cold rolled substrate, a hot-dip galvanized substrate, and an electrogalvanized substrate. The coating types can be divided into polyester, silicon modified polyester, polyvinylidene fluoride and plastisol. The surface state of color-coated steel sheets can be divided into coated sheets, embossed sheets and printed sheets. Color-coated steel sheets are widely used in construction appliances and transportation industries. For the construction industry, they are mainly used in steel structures, airports, warehouses and freezers. For roofs and doors of industrial and commercial buildings, there are fewer color steel plates for civil buildings.
The sapwood is light brown with a grey or pink tinge and is not sharply differentiated from the heartwood, which is light grey-brown with a pink tinge. Some trees develop a corewood, which is streaked with orange and red lines.
DENSITY
The timber is a Medium Hardwood with a density of 640-880 kg/m3 air dry.
Untreated specimens of merpauh measuring 50 mm x 50 mm x 600 mm achieved an average service life of 1.5 years at the testing ground at the Forest Research Institute Malaysia (FRIM). This placed the timber under the non durable category. The timber is readily attacked by insects and fungi, especially staining fungi, which discolour both the sapwood and heartwood.
Based on trials carried out on two species of merpauh, it was found that the treatability of the timber varies considerably, from very easy to average.
Texture is moderately coarse but even, with interlocked grain.
The timber falls into Strength Group B (Engku, 1988b) or SG 4 (MS 544:Part 2:2001).
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NATURAL DURABILITY
PRESERVATIVE TREATMENT
TEXTURE
STRENGTH PROPERTIES