a) Power Level
Wood diprasaratkan power level is seen from strength persisted, flexural strength, and its density
b) Level of Use
There are five kinds of wood consumption levels:
Level I and II: for the purposes of heavy constructions, unprotected and exposed to moist soil that is included in the first level are: teak, merban, bangkirai, purchase, resak, etc.
Level III: for the purposes of heavy constructions, which are protected, among which are included in this rate: flower, camphor, yellow, etc.
Level IV: for the purposes of lightweight constructions which are protected meranti, suren, jengjing, etc.
Level V: For the purposes of temporary work.
This type of wood as a building material appropriate levels of use are:
Teak (Tectona grandis)
Usage level I, level of durability I, Level II powers BJ = 0.67.
Teak wood is one of the best in the world seluiruh. Many were found on the island of Java, namely in the area of Rembang, Madiun and Kediri. Including wood stable, ie fireworks susutnya only slightly, due to the growth arrested containing lime, often inside the timber there are many nests of lime. This led quickly dulling of tools for working wood (eg saws, planers, etc.).
Is widely used to make robust construction such as bridges, etc. hangar. Many also used to make furniture, teak color first gray brown and when have long been exposed to light and air the color changed to brown
Merbau
Bangkirai
Belian
resak
Rasamala
Physical examination and Mechanical Wood
o Hitng flexural strength by the formula 3 PL / 2BH², where
P = Load Fracture
L = Distance Pedestal
B = Width Test Objects
H = High Test Objects
Wood hardness inspection
– Menghitunga burden of the field testing of the figures obtained average hardness of the end of the radial and tangential.
Examination Density
After the specimen into the measuring cup, the water will rise to (Y ml)
The volume of the test object can be searched is Y minus X ml ml
Calculate the density of the wood by the formula:
Natural Durability Testing
Natural durability against wood destroying class of biological factors can be determined in 2 ways ie:
(a) How Grave (Test Graveyard)
(b) How Laboratory (Laboratory Test)