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

Mechanical properties of wood include _________.

It is a longitudinal separation of the fibers which extends to the opposite face of a piece of sawn timber.

It is a wood defect caused by insects and beetles.

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

Scaffold is an _______________________ structure having a platform used to support workers, equipment, and other materials.

Serious injury or death may result from _____________assembly or use of scaffold equipment.

Report any unsafe conditions to ________________.

Inspect all equipment ________ use.

Inspect assembled scaffold ___________ and be sure that it is maintained in a safe condition.

Maintain _____ equipment in good condition.

Consult your scaffolding __________ when in doubt.

Always place scaffolds on a ground, __________ surface and assure that it is adequate to support the intended scaffold loads.

The tying of the scaffold to the structure is of great ___________ to the stability and safety of the scaffold.

_______________ guardrails, mid-rails, and toe-boards at all openings, open sides, and ends of every work platform.

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

It is used to prevent lateral movements of the scaffold.

A part of scaffold that is fixed to support the outriggers.

What is the best lumber suited to make as scaffolding?

A part of scaffold that holds the platforms.

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

It is used to prevent lateral movements of the scaffold.

A part of scaffold that is fixed to support the outriggers.

What is the best lumber suited to make as scaffolding?

A part of scaffold that holds the platforms.