It is a wood defect caused by insects and beetles.

 It is the warping of lumber where the ends twist in opposite direction.

It is a longitudinal separation of the fibers.

  A raised floor is used to step on by worker while working.

A part of scaffold that holds the platforms.

 It is used to prevent lateral movements of the scaffold.

 It is the best lumber suited to make as scaffolding.

Below are the material/tool/equipment used in assembling wooden scaffold, EXCEPT?

Below are the list of material/tool/equipment used in disassembling wooden scaffold, EXCEPT?

It is used to pull out fasteners.

It is the ratio of the mass of water contained in the mass of the same sample of dry wood.

  Do not work or allow persons to work on scaffolds when sick or suffering from any other physical symptom which could affect their ability to work safely.

 Do not inspect assembled scaffolds frequently.

Never allow excessive quantities of components to be stockpiled on partially completed scaffolds.

A scaffold is a permanent structure installed to ensure safety.