Is wane a lumber defect?

Is wane a lumber defect?

Wane is defined on www.dictionary.com as “a defect in a plank or board characterized by bark or insufficient wood at a corner or along an edge, due to the curvature of the log.” Wane can be pronounced (as in the timber above) or more subtle (as in the timbers below.)

What is wood wane?

Wane: The presence of bark or the lack of wood fiber along the edge of a piece of lumber.

What are the defects of wood?

Common Wood Defects: Types & Causes of Lumber Issues

• Checks and Splits. A check is a term used to describe a crack that runs through a board, usually running lengthwise.
• Rot and Decay. Rot and decay is the general description for the disintegration of wood fiber.
• Ring Shake.
• Pitch, Gum and Sap.
• Wane.
• Crook or Crown.
• Bow.
• Cup.

What is the most common cause of natural defects in lumber?

Lumber defects can give a unique character to a piece of wood, but for structural integrity, the defects should be kept to a minimum. Most of the following are caused by problems with cutting, stacking, or drying the wood—with the exception of naturally-occurring knots.

Why is my treated wood cracking?

Treated lumber is injected with chemicals that are mixed with water. As the sun cooks out the water, the lumber shrinks. This shrinkage usually causes tiny checking cracks to form.

What is a shake in wood?

Wood shake refers to wood roofing material that is created by splitting thin rectangles from a wooden log. There are two types of wood roofing materials – wood shake and wood shingles. Wood shakes are typically sawn on one side and hand split on the other side, making them thicker than wood shingles.

What is crook in wood?

crook: a warp along the length of the edge of the wood. cup: a warp across the width of the face, in which the edges are higher or lower than the center of the wood. twist or wind: a distortion in which the two ends do not lie on the same plane. Winding sticks assist in viewing this defect.

What causes blue stain in wood?

Blue stain is caused by fungi that grow in sapwood and use parts of it for their food. It is not a stage of decay, although the conditions that favor blue staining also very often lead to infectionwith decay-producing fungi. Their growth is dependent upon proper food, moisture, air, and favorable temperatures.

What causes wane on a board?

Wane or skip is caused when surfacing machines or planers fail to remove all of the material from a low spot on the lumber. Wane usually occurs on one side of the board only and typically doesn’t affect the integrity of the lumber.

What is wane defect in timber?

Wane. The edge part of the timber log contains a rounded edge on one side because of its original rounded surface. This rounded edge is called wane.

Does checking weaken wood?

The Short Answer: Wood Checking Wood shrinks roughly twice as much along with the growth rings (radially) as it does across the rings (tangentially). It is this uneven shrinkage that causes checks to develop.

Are splits in wood bad?

While extreme loading can cause a wood beam (or more rarely a post) to split and would indicate a sign of impending disastrous collapse, usually the splits or cracks found in wooden posts and beams are due to shrinkage as wood dries, occur along the grain, and do not raise a structural concern.

What is a wane in wood?

Here is an illustration of wane on a couple of piece of wood. It’s the place where the bark edge gets into the plank. Usually because they tried to make too wide a plank from a log and some wane with bark got the corner or sometimes the whole length. It does not affect the durability, mostly the appearance (cosmetics).

What happens to wood when it dries out?

Since the weakest strength property in wood is tension perpendicular to the grain (similar to the manner in which wood is split using an ax), drying stresses can result in a check or split that form in a radial direction across the annual rings.

What are the physical properties of wood?

Physical properties describe the quantitative characteristics of wood and its behavior to external influences other than applied forces. Included are such properties as moisture content, density, dimensional stability, thermal and pyrolytic (fire) properties, natural durability, and chemical resistance.

What is the weakest strength property in wood?

Since the weakest strength property in wood is tension perpendicular to the grain (similar to the manner in which wood is split using an ax), drying stresses can result in a check or split that form in a radial direction across the annual rings. However, while these seasoning characteristics may initially appear as problematic, they likely are not.