Wood structural elements may be supporting or protecting, depending on their use. They are distinguished by type, namely, beams, trusses, arches, frames, vaults, and shells and by the means used to join the elements, such as nails, pegs, keys, buttressing, and glue.
What type of wood is structural?
Douglas Fir, Ponderosa Pine, White Fir and Western Red Cedar are the most common single species sold as dimension lumber products. Structural lumber (including dimension lumber) is visually and/or mechanically (MSR) graded for its strength and physical working properties (appearance is secondary, unless specified).
What are wood members?
Wood members are cut and joined to create floors, walls and the roof of a structure according to the set of construction documents and local building codes.
What are structural wood products?
These products include Glued-Laminated (glulam) Wood Beams (treated & untreated), Glulam and Solid Timber trusses, Wood Roof Decking, Nailbase and Vented Nailbase Insulation, Open Web Joists, Wood I-Joists, Rim Board and Insulated Rim Board, Laminated Veneer Lumber headers and beams, Hardware Connectors and Accessories
What type of wood is used for structural framing?
A stud wood type that is favored is the Douglas Fir, known for its structural strength. The framing lumber species will change for each region, such as Douglas Fir-Larch in the west and Hem-Fir in the east. Some projects require more than one type of wood.
What are the 3 types of framing for wood structures?
Modern wood framing essentially includes three types: balloon, platform and semi-balloon framing. With long lumber lengths, vertical load-bearing framing studs run continuously from foundation to roof.
Is Douglas fir structural?
When architects and engineers look for the best in structural lumber, their first choice repeatedly is Douglas Fir. It is dimensionally stable and universally recognized for its superior strength-to-weight ratio. Its high specific gravity provides excellent nail and plate-holding ability.
What type of wood is used for ceiling joists?
Basic Ceiling Joist Spacing Joist spacing in this design mode incorporates different types of wood used in ceiling construction, including #2 grades of southern pine, Douglas fir and hemlock fir types, which are the most common.
What is wood joist framing?
A joist is a horizontal structural member used in framing to span an open space, often between beams that subsequently transfer loads to vertical members. Wood joists were also used in old-style timber framing.
What is a joist in construction?
joist, ceiling or floor support in building construction. Joists—of timber, steel, or reinforced concrete—are laid in a parallel series across or abutting girders or a bearing wall, to which they are attached, usually by metal supports called joist hangers, or anchors.
How is dimensional lumber manufactured?
After boards are cut, they are dried and planed. In general, thinner pieces destined to be made into boards are cut from the outer portion of the log where there are fewer knots. Thicker pieces for dimension lumber are cut next, while the center of the log yields stock for heavy timber pieces.
What are some examples of prefabricated wood products?
Prefabricated wood components may include light frame walls, floors and roof trusses or mass timber elements such as cross-laminated timber (CLT) panels, nail-laminated timber (NLT) panels, dowel-laminated timber (DLT) panels and glue-laminated timber (GLT) columns and beams.
What is 4x lumber?
Hardwood lumber comes in thicknesses measured in quarters of an inch. 1″ lumber is called 4/4 (four quarters). 2″ lumber is called 8/4 (eight quarters). Here’s how they compare.
What wood is used for beams?
Douglas fir Fir is an excellent wood for highly finished post & beam frames and commercial work because of its strength and beautiful grain. It is one of the most abundant wood species in North America and is one of the most popular choices for Timber Framing.
What type of wood is used for load bearing beams?
Elm is so strong and water-resistant that it is the preferred timber for wooden bridge abutments and dock pilings. Maple is strong and attractive, so it is often used in wooden floors and cabinets. Oak, at nearly 1 1/2 times the density of pine, is still the construction standard for heavy-load bearing interior beams.
Is cedar a structural wood?
It’s not as strong as Douglas-fir, but cedar can be milled into structural members and often is specified for architectural designs that include exposed posts, beams and rafters.