a) Examination of wood bending strength
Tools and materials required:
o machine press / pull with equipment
o Dial manometer
o ruler measuring / roller meter
o Wood with a size of 5 x 5 x 76 cm
Inspection Method
o Prepare equipment of the flexural strength at press machine
o Put the timber on a machine with a distance of 70 cm pedestal.
o Give the burden on the middle of the wood with a speed of 2.5 mm per minute with a deviation ± 25%.
o Note the loading and decrease deflection.
o Read load (P) if the timber has suffered broken and not able to be burdened.
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
b) Examination of Courage Press Parallel Wood Fiber
Tools and materials required:
– Press machine with equipment
– Timber size of 5 x 5 x 20 cm
Inspection Method
– The breadth of the field of press timber (5 x 5 cm) F
– Put the test objects on a machine press
– Imposition is done continuously at the velocity of 0.008 cm long each test sample per minute.
– Reading of the load (P) and the deformation is done until it reaches a maximum.
– Calculate the firmness of wood fibers parallel press
c) Determination Examination Perpendiculars Fiber
Tools and materials required:
– Press machines with supplies
– Ruler measuring / roller meter
– Iron slab 5 x 5 cm with a thickness of 5 mm
– Timber size 5 x 5 x 15 cm
Investigation Method:
– The test object is placed on the machine planers
– Put the plates 5 x 5 cm with a thickness of 5 mm above the test specimen is right in the middle.
– Charges pressed continuously, at a speed of 0.3 mm per minute, so the burden will work through the iron plate on wood radial field.
– Charges pressed against the specimen until urgent 2.5 mm iron plate.
– Determine the compressive strength perpendicular to the fiber.
d) Examination Strong Pull Perpendiculars Fiber
Tools and materials required:
– Engine drag
– Drill with Ø 2,5 cm
– Saws
– Wood with a size of 4 x 5 x 6 cm
Investigation Method:
– Place the specimen in the tensile tool in a tight squeeze on the tensile machine.
– Load is given continuously at a speed of 0.25 cm per minute.
– Test results are seen to rupture load (P) kg
– Calculate the perpendicular fiber tensile firmness
e) Examination of Parallel Fiber Pull Strength
Tools and materials needed
– Tensile machine and equipment
– Saws
– Sculpture wood
– Wood as in the picture
Inspection Method
– The test object enter the machine pull clamp
– The specimens were withdrawn continuously at a speed of 0.25 cm per minute
– Objects drawn up broke and kekuatannta (P)