Wood Floor Truss Span Tables

Wood floor truss span tables provide the maximum clear span lengths for wood floor trusses based on their span, spacing, and design load. These tables are essential for structural engineers, architects, and contractors involved in the design and construction of wood-framed buildings.

Floor trusses are pre-fabricated structural components that consist of a top and bottom chord connected by equally spaced web members. These trusses are designed to carry the weight of the floor and any live loads, such as occupants and furniture. By using trusses, builders can create spans that are longer than what could be achieved using traditional framing methods, such as joists and beams.

Wood floor truss span tables are typically provided by the truss manufacturer and are based on the specific design of their trusses. The tables include information such as the truss span, the spacing between the trusses, the design load, and the maximum clear span length that can be achieved.

When using wood floor truss span tables, it is important to select the correct table for the specific type of truss being used. The tables are typically organized by truss type, such as parallel chord trusses, attic trusses, and vaulted trusses. Once the correct table has been selected, the engineer or contractor can determine the maximum clear span length for the given truss spacing and design load.

In addition to providing the maximum clear span length, wood floor truss span tables may also include other information, such as the allowable deflection of the truss under the design load. This information can be useful for determining whether the truss will meet the deflection criteria for the building.

Wood floor truss span tables are an essential tool for structural engineers, architects, and contractors involved in the design and construction of wood-framed buildings. By using these tables, engineers can ensure that the floor trusses are properly designed and installed, resulting in a safe and efficient structure.

Factors Affecting Wood Floor Truss Span

The span of a wood floor truss is affected by several factors, including:

Truss Type: Different types of trusses have different span capabilities. For example, parallel chord trusses have longer spans than attic trusses.
Truss Depth: Deeper trusses have longer spans than shallower trusses.
Truss Spacing: Closer truss spacing results in shorter spans.
Design Load: Higher design loads result in shorter spans.
Truss Material: The type of wood used to construct the truss can affect its span.

Considerations for Using Wood Floor Truss Span Tables

When using wood floor truss span tables, it is important to consider the following:

Accuracy of the Tables: Span tables provided by truss manufacturers are based on specific design criteria. It is important to ensure that the tables are accurate and have been developed using recognized engineering standards.
Truss Installation: Trusses must be installed according to the manufacturer's instructions to ensure their structural integrity.
Site Conditions: The building site can affect the span of wood floor trusses. Factors such as soil conditions and wind loads should be considered.
Building Codes: Span tables may not account for all applicable building codes. It is the responsibility of the engineer or contractor to ensure that the trusses meet all applicable building code requirements.