Wall stud

Last updated
A typical wall section in platform framing
Cripple
Window header
Top plate / upper wall plate
Window sill
Stud
Sill plate / sole plate / bottom plate WallPanelDiagram.svg
A typical wall section in platform framing
  1. Cripple
  2. Window header
  3. Top plate / upper wall plate
  4. Window sill
  5. Stud
  6. Sill plate / sole plate / bottom plate

Wall studs are framing components in timber or steel-framed walls, that run between the top and bottom plates. It is a fundamental element in frame building. The majority non-masonry buildings rely on wall studs, with wood being the most common and least-expensive material used for studs. Studs are positioned perpendicular to the wall they’re forming to give strength and create space for wires, pipes and insulation. Studs are sandwiched between two horizontal boards called top and bottom plates. These boards are nailed or screwed to the top and bottom ends of the studs, forming the complete wall frame. Studs are usually spaced 16 in. or 24 in. apart. [1]

Contents

Etymology

Stud is an ancient word related to similar words in Old English, Old Norse, Middle High German, and Old Teutonic generally meaning prop or support. [2] Other historical words with similar meaning are quarter [2] and scantling [1] (one sense meaning a smaller timber, not necessarily the same use). Stick is a colloquial term for both framing lumber (timber) and a "timber tree" [3] (a tree trunk good for using as lumber (timber)); thus, the names "stick and platform", "stick and frame", "stick and box", or simply stick framing. The stud height usually determines the ceiling height, thus sayings like: "...These rooms were usually high in stud..." [2]

Purpose

Studs form walls and may carry vertical structural loads or be non load-bearing, such as in partition walls, which only separate spaces. They hold in place the windows, doors, interior finish, exterior sheathing or siding, insulation and utilities and help give shape to a building. Studs run from sill plate to wall plate. In modern construction, studs are anchored to the plates in a way, such as using fasteners, to prevent the building from being lifted off the foundation by severe wind or earthquake.

Properties

Studs are usually slender, so more studs are needed than in post and beam framing. Sometimes studs are long, as in balloon framing, where the studs extend two stories and carry a ledger which carries joists. Balloon framing has been made illegal in new construction in many jurisdictions for fire safety reasons because the open wall cavities allow fire to quickly spread such as from a basement to an attic; the plates and platforms in platform framing provide a passive fire stop inside the walls, and so are deemed much safer by fire safety officials. Being thinner and lighter, stick construction techniques are easier to cut and carry and is speedier than the timber framing.

In the United States and Canada, studs are traditionally made of wood, usually 2×4 or 2×6 by name; however, these historical dimensions have been reduced but still carry the name of "two by four" and "two by six". Typical dimensions of today's "two by four" is 1.5 by 3.5 inches (38 mm × 89 mm) dimensional lumber prior to sanding and are typically placed 16 inches (406 mm) from each other's center, but sometimes also at 12 inches (305 mm) or 24 inches (610 mm). The wood needs to be dry when used, or problems may occur as the studs shrink and twist as they dry out. Steel studs are gaining popularity as a non-combustible alternative, especially for non load-bearing walls, and are required in some firewalls.

In New Zealand, the required lumber size and spacing of wall studs are determined using NZS 3604 Timber-framed buildings table 8.2 for loadbearing walls and table 8.4 for non-loadbearing walls. [4]

Other terms

The studs used to frame around window and door openings are sometimes given different names, including:

A building technique mostly associated with Lincolnshire, England, and parts of Scotland gets part of its name from the studs: mud and stud (stud and mud). This building method uses studs in a framework which is then totally covered with mud which resembles the building material cob. [5] Another traditional building method is called stud and plaster where the plaster walls are held by lath on the studs. Studs are also the namesake of a type of timber framing called close studding.

Grades

Based on the American West Coast Lumber Inspection Bureau (WCLIB) grading rules, [6] there is only one grade of stud: STUD. A stud is graded for vertical application and its stress requirements and allowable visual defects reflect that application. A stud is most similar to a #2 grade, which is held to a higher standard during grading. The biggest difference between the two is the frequency, placement and size of knots and overall allowable wane.

See also

Related Research Articles

<span class="mw-page-title-main">Nail (fastener)</span> Sharp object of hard metal used as a fastener

In woodworking and construction, a nail is a small object made of metal which is used as a fastener, as a peg to hang something, or sometimes as a decoration. Generally, nails have a sharp point on one end and a flattened head on the other, but headless nails are available. Nails are made in a great variety of forms for specialized purposes. The most common is a wire nail. Other types of nails include pins, tacks, brads, spikes, and cleats.

<span class="mw-page-title-main">Lumber</span> Wood that has been processed into beams and planks

Lumber is wood that has been processed into uniform and useful sizes, including beams and planks or boards. Lumber is mainly used for construction framing, as well as finishing. Lumber has many uses beyond home building. Lumber is referred to as timber in the United Kingdom, Europe, Australia, and New Zealand, while in other parts of the world the term timber refers specifically to unprocessed wood fiber, such as cut logs or standing trees that have yet to be cut.

<span class="mw-page-title-main">Cordwood construction</span> Wall construction from pieces of wood bonded with mortar or clay

Cordwood construction is a term used for a natural building method in which short logs are piled crosswise to build a wall, using mortar or cob to permanently secure them. This technique can use local materials at minimal cost.

<span class="mw-page-title-main">Timber framing</span> Traditional building technique

Timber framing and "post-and-beam" construction are traditional methods of building with heavy timbers, creating structures using squared-off and carefully fitted and joined timbers with joints secured by large wooden pegs. If the structural frame of load-bearing timber is left exposed on the exterior of the building it may be referred to as half-timbered, and in many cases the infill between timbers will be used for decorative effect. The country most known for this kind of architecture is Germany, where timber-framed houses are spread all over the country.

<span class="mw-page-title-main">Structural insulated panel</span>

A structural insulated panel, or structural insulating panel, (SIP), is a form of sandwich panel used in the construction industry.

<span class="mw-page-title-main">Joist</span> Horizontal framing structure

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. When incorporated into a floor framing system, joists serve to provide stiffness to the subfloor sheathing, allowing it to function as a horizontal diaphragm. Joists are often doubled or tripled, placed side by side, where conditions warrant, such as where wall partitions require support.

<span class="mw-page-title-main">Flat (theatre)</span> Flat piece of theatrical scenery

A flat or coulisse is a flat piece of theatrical scenery which is painted and positioned on stage so as to give the appearance of buildings or other background.

The architecture of the California missions was influenced by several factors, those being the limitations in the construction materials that were on hand, an overall lack of skilled labor, and a desire on the part of the founding priests to emulate notable structures in their Spanish homeland. While no two mission complexes are identical, they all employed the same basic building style.

<span class="mw-page-title-main">Framing (construction)</span> Construction technique

Framing, in construction, is the fitting together of pieces to give a structure, particularly a building, support and shape. Framing materials are usually wood, engineered wood, or structural steel. The alternative to framed construction is generally called mass wall construction, where horizontal layers of stacked materials such as log building, masonry, rammed earth, adobe, etc. are used without framing.

A tie, strap, tie rod, eyebar, guy-wire, suspension cables, or wire ropes, are examples of linear structural components designed to resist tension. It is the opposite of a strut or column, which is designed to resist compression. Ties may be made of any tension resisting material.

<span class="mw-page-title-main">Wall plate</span> A horizontal, structural, load-bearing member in wooden building framing

A plate or wall plate is a horizontal, structural, load-bearing member in wooden building framing.

<span class="mw-page-title-main">Storey pole</span>

A storey pole is a length of narrow board usually cut to the height of one storey. It is used as a layout tool for any kind of repeated work in carpentry including stair-building, framing, timber framing, siding, brickwork, and setting tiles. The pole is marked for the heights from (usually) the floor platform of a building for dimensions such as window sill heights, window top heights, exterior door heights, interior door heights, wall gas jet heights and the level of the next storey joists. It makes for quick, repeatable measurements without the need of otherwise calibrated measuring devices or workers skilled in using them.

<span class="mw-page-title-main">Sill plate</span> Bottom horizontal member of a wall which vertical members are attached to

A sill plate or sole plate in construction and architecture is the bottom horizontal member of a wall or building to which vertical members are attached. The word "plate" is typically omitted in America and carpenters speak simply of the "sill". Other names are rat sill, ground plate, ground sill, groundsel, night plate, and midnight sill.

<span class="mw-page-title-main">Tin can wall</span>

A tin can wall is a wall constructed from tin cans, which are not a common building source. The cans can be laid in concrete, stacked vertically on top of each other, and crushed or cut and flattened to be used as shingles. They can also be used for furniture.

<span class="mw-page-title-main">Pole building framing</span> Construction method

Pole framing or post-frame construction is a simplified building technique that is an alternative to the labor-intensive traditional timber framing technique. It uses large poles or posts buried in the ground or on a foundation to provide the vertical structural support, along with girts to provide horizontal support. The method was developed and matured during the 1930s as agricultural practices changed, including the shift toward engine-powered farm equipment and the demand for cheaper, larger barns and storage areas.

The Mitchell – Foster – Young House is a historic house located just outside Oxford, Mississippi off the highway to New Albany. The house, thought to be one of the oldest standing farmhouses in the county, is listed on the National Register of Historic Places.

<span class="mw-page-title-main">I-joist</span> Engineered wood joist

An engineered wood joist, more commonly known as an I-joist, is a product designed to eliminate problems that occur with conventional wood joists. Invented in 1969, the I-joist is an engineered wood product that has great strength in relation to its size and weight. The biggest notable difference from dimensional lumber is that the I-joist carries heavy loads with less lumber than a dimensional solid wood joist. As of 2005, approximately 50% of all wood light framed floors used I-joists. I-joists were designed to help eliminate typical problems that come with using solid lumber as joists.

<span class="mw-page-title-main">Wattle and daub</span> Building technique using woven wooden supports packed with clay or mud

Wattle and daub is a composite building method used for making walls and buildings, in which a woven lattice of wooden strips called "wattle" is "daubed" with a sticky material usually made of some combination of wet soil, clay, sand, animal dung and straw. Wattle and daub has been used for at least 6,000 years and is still an important construction method in many parts of the world. Many historic buildings include wattle and daub construction.

<span class="mw-page-title-main">American historic carpentry</span>

American historic carpentry is the historic methods with which wooden buildings were built in what is now the United States since European settlement. A number of methods were used to form the wooden walls and the types of structural carpentry are often defined by the wall, floor, and roof construction such as log, timber framed, balloon framed, or stacked plank. Some types of historic houses are called plank houses but plank house has several meanings which are discussed below. Roofs were almost always framed with wood, sometimes with timber roof trusses. Stone and brick buildings also have some wood framing for floors, interior walls and roofs.

NZS 3604 Timber-framed buildings is a New Zealand technical standard which sets out specifications and methods for designing and constructing light timber-framed houses and other low-rise buildings. When read together with the amendments in Building Code acceptable solution B1/AS1, it allows the construction of code-compliant buildings up to three storeys high on good ground without the need for specific structural engineering. The standard is maintained by Standards New Zealand.

References

  1. 1 2 "Scantling" def. 3.a. Oxford English Dictionary
  2. 1 2 3 "Stud". def. 1. Oxford English Dictionary Second Edition on CD-ROM (v. 4.0) © Oxford University Press 2009
  3. Whitney, William Dwight, and Benjamin E. Smith. The Century dictionary and cyclopedia. New York: Century Co., 1901. Print. accessed 1/9/2014
  4. Timber-framed buildings: NZS 3604:2011. Wellington: Standards New Zealand. 2011. p. 8.9. ISBN   9781869751432.
  5. Keefe, Laurence. Earth building: methods and materials, repair and conservation. London: Taylor & Francis, 2005. 14. Print.
  6. "WCLIB Grading Rules for National Grades – Framing Lumber" (PDF). Retrieved 2010-01-09.