Various types of defects in the wood may affect the weakening of a building that uses wood construction because of the presence of wood defects decrease the strength of wood.

For manufacturers of wood, wood defects are losses that can cause a decrease in timber prices, though the manufacturer should still protect consumer rights by notifying the wood defects, given the dire risk of collapse of buildings that may occur because of defective wood that was not anticipated.

Types of defects in the wood, among others:

Disability knots

Effect of knots, which reduces the strength properties of wood, workmanship difficult because of the cross-section hardwood eye (the eye healthy wood), reduced the beauty of the wood surface and cause holes sheets finir.

Cracked and split

These defects result in tensile strength and firmness press wood is reduced due to uneven stress distribution during weight-bearing wood, wood shear strength decreased due to a reduction in the area that holds the slide.

Cracked and broken bow bracelet

His influence can cause compressive strength, tensile and shear strength of wood decreases.

Heart brittle wood

This defect usually occurs in broad-leaf timber which causes the strength of wood down and complicate the current process finir.

Fungus wood attacker

These defects cause brittle wood so that the power down and then suddenly broken when a given load

Insect wood destroyer

Blemish in the form of holes in the wood causing the wood power down and reduce the beauty of wood surfaces.

Drill holes and wormholes sea

Holes caused by insect borers or marine worms. In general, attacked the newly cut wood and the trees are still standing.

Woods that disability can still be used on buildings that are not structural positions such as window frames and doors with paint finish.

Structural position as the pole to the house, horses, beams have to use wood that has more power than the load to be placed thereon.