Two plank scaffold consists of planks interlocking to form a continuous surface for a work area. It is used in a variety of construction applications.
The surface of the work area may be protected by a protective covering such as a paint, wood preservative, fire-retardant coating or other means. The covering must not obscure any of the scaffold’s top or bottom wood surfaces.
In order to provide a safe, comfortable working surface, all scaffolding platforms must overlap with each other at least twelve inches and be secured from movement. In addition, scaffolding platforms and walkways must be at least 18 inches wide.
Depending on the job, there are several types of scaffolding to choose from:
Scaffolding for construction sites typically uses metal or steel tube. There are also a few other options for scaffolding, such as plastic or composite material.
Solid sawn wood is usually the most common type of plank used for scaffolding, but some alternative materials are available. These include laminated veneer lumber (LVL) and aluminum planks.
Laminated veneer lumber is a more expensive choice, but it’s stronger and much more predictable than solid-sawn planks. LVL is also proof-loaded and OSHA-approved.
Unlike the solid-sawn version, LVL is not susceptible to knots or other strength-reducing characteristics like cross-grain or juvenile wood.
The most important design properties used to determine the ability of a board to support specified loads over specific spans are its fiber bending (Fb) value and modulus of elasticity (MOE). The higher the Fb value, the greater the load the board will safely handle before it fractures or breaks.
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