skin / truss / truss
skin / truss / property
skin / truss / truss
- arch truss: A truss having an arched upper chord (concave downward) and a straight bottom chord; there are two vertical hangers between the two chords.
- spere-truss: In a medieval hall of timber construction, a roof-supporting wooden arch, rising from trusses attached to the sidewalls, marking the division between the principal area of the hall and the screens passage.
- Belfast: Truss of timber, for spans of up to 15 meters, with a segmental top member joined to a horizontal lower chord, string, or tie (sometimes slightly cambered) by inclined lattice-members.
- Belfast truss: A bowstring truss, for large spans, which is constructed entirely of timber components; the upper member is bent, and the lower member is horizontal.
- Belgian: Of or pertaining to a pitched truss having only inclined web members.
- Belgian truss: Type of truss used as a roof support.
- Fink truss: A Belgian truss having subdiagonals to reduce the length of compression web members toward the centerline of the span.
- bowstring: See truss.
- bowstring beam: In British usage, same as bowstring, in composition.
- bowstring truss: A truss having a curved top chord meeting a straight bottom chord at each end.
- bow-string truss: A truss having a curved top chord meeting a straight bottom chord at each end.
- camelback truss: A truss having both top and bottom chords curving upward from a common point at each side.
- composite truss: A truss having timber compression members and steel tension members.
- crescent truss: A truss having both top and bottom chords curving upward from a common point at each side. Also called camelback truss.
- fan truss: A truss having more than two web members radiating from a common point on the bottom chord.
- French truss: Also see Fink truss.
- funicular truss: A truss having an overall shape derived from the funicular shape for a particular set of loads. The interior members of a funicular truss are zero-force members which serve only to brace compression members but they will carry forces if any changes occur in the pattern or magnitude of the loads.
- gusset: A flat bracket used to stiffen the connection of two wood members; most often found at the joints of wood trusses.
- gusseted W-type truss: A type of truss that is widely used today.
- hammer-beam truss: Also see truss.
- Howe: Of or pertaining to a flat or pitched truss having vertical web members in tension and diagonal web members in compression.
- Howe truss: Also see truss.
- king post: A truss in which one post was placed from the collar beam to the gable peak, often in connection with a ridgepole, on each gable end. On occasion two additional diagonal struts were placed adjacent to the foot of the king post and reached to the middle of each side of the gable.
- king post truss: A triangular frame formed by two inclined members joined at their apex and a horizontal tie beam that connects their lower ends; a vertical central strut (a king post or a kingbolt) extends from apex to tie beam.
- king truss: A pitched truss having a king post.
- king-post: An upright timber extending from the ridge to the tie-beam of a roof-truss.
- king-post truss: A triangular frame formed by two inclined members joined at their apex and a horizontal tie beam that connects their lower ends; a vertical central strut (a king post or a kingbolt) extends from apex to tie beam.
- lattice truss: AA truss the upper and lower members of which are joined by lattice-like struts.
- latticed truss tube: A braced tube structure having perimeter frames of closely spaced diagonals with no vertical columns.
- parallel-chord truss: A truss having parallel top and bottom chords. Flat trusses are generally not as efficient as pitched or bowstring trusses.
- pitched truss: A truss having inclined top chords.
- plane truss: A truss all of whose members lie in a single plane.
- flat pratt truss: A type of modern truss used as a roof support.
- flat truss: A truss having parallel top and bottom chords. Flat trusses are generally not as efficient as pitched or bowstring trusses. Also called parallel-chord truss.
- Pratt: Of or pertaining to a flat or pitched truss having vertical web members in compression and diagonal web members in tension.
- Pratt truss: Also see truss.
- queen post: One of the two vertical supports in a queen-post truss.
- queen post truss: A truss in which two posts were placed between the roof and the outside edges of the collar beam. Another beam capped the posts to stiffen this truss.
- queen truss: A pitched truss having two queen posts connected by a straining piece.
- queen-post: See truss.
- queen-post roof: A roof supported by two queen posts.
- raised-chord truss: A truss having a bottom chord raised substantially above the level of the supports.
- scissor beam: The tie of the scissor beam truss.
- scissor brace: A traditional truss used as a roof support.
- scissor truss: A form of truss which serves without a bottom horizontal chord.
- scissors truss: A pitched truss having tension members extending from the foot of each top chord to an intermediate point on the opposite top chord.
- scissor-truss: See truss.
- space truss: A three-dimensional structural frame based on the rigidity of the triangle and composed of linear elements subject only to axial tension or compression. The simplest spatial unit of a space frame is a tetrahedron having 4 joints and 6 structural members. As with plate structures, the supporting bay for a space frame should be square or nearly square to ensure that it acts as a two-way structure.
- roof principal: A roof truss.
- roof truss: Any type of truss used for roof support.
- simple truss: Also see truss.
- truss: A frame assembled of small members (of wood or metal) in triangular sections; used to span large distances.
- trussing: The rigid members forming a truss subject to axial forces proportional to the rise of the truss. Buckling generally governs the size of compression members, while tensile stresses at the weakest points, usually at the connections, control the size of tension members. 2. A structure formed by trusses. While rigid in its own plane, a truss must be braced in a perpendicular direction to prevent lateral buckling.
- Vierendeel truss: From M. A. Vierendeel, Belgian engineer, who developed it in 1896. A lattice frame with members at right angles that derives its strength from the rigidity built into its joints; it has no diagonal members as in a typical truss.
- wa-goya: In a traditional Japanese structure, a roof-truss system, distinct from European truss systems; consists only of a combination of horizontal and vertical members.
- Warren truss: Of or pertaining to a flat or bowstring truss having inclined web members forming a series of equilateral triangles. Vertical web members are sometimes introduced to reduce the panel lengths of the top chord which is in compression.
- auxiliary rafter: In a truss, a rafter used to stiffen the principal rafter as by doubling it, or, as in a queen post truss, to go from the tie beam to the queen post, thus doubling the sloping chord of the truss in that place.
- auxillary rafter: A rafter reinforcing a principal rafter or a diagonal member of a queen truss. Also called cushion rafter.
- cushion rafter: In a truss, a rafter used to stiffen the principal rafter as by doubling it, or, as in a queen post truss, to go from the tie beam to the queen post, thus doubling the sloping chord of the truss in that place.
- firm: One of two rafters which form a truss; as a pair of firms. The term is local in England, or nearly obsolete.
- principal rafter: One of the diagonal members of a roof truss which support the purlins on which the common rafters rest.
- trussed rafter: A truss is essentially a triangle formed by any one of a combination of structural members into a rigid roof framework for spanning between two load-bearing walls.
- Bow’s notation: The method of labeling the spaces between forces or their lines of action with letters, each force being identified by the two letters in the adjacent spaces when proceeding in a clockwise manner around a joint.
- chord: A principal member of a truss which extends from one end to the other, primarily to resist bending; usually one of a pair of such members. 2. The straight line between two points on a curve. 3. The span of an arch.
- chords: Either of the two principal members of a truss extending from end to end and connected by web members.
- colonelli: Italian term for the posts employed in any truss framing.
- crown post: Any vertical member in a roof truss, especially a king post.
- eye bar: A tension member of an iron or steel truss, wrought with an eye at each end, through which passes the pin forming the joint.
- heel: That part of a framing member which rests on the top plate.
- method of sections: A method for determining member forces in a truss by considering the equilibrium of any portion of the truss assembly.
- node: A joint between two or more members of a truss. A truss must be loaded only at its panel points if its members are to be subject only to axial tension or compression.
- panel length: The space on the chord of a truss between any two adjacent joints made by principal web members with the chord.
- panel point: A joint between two or more members of a truss. A truss must be loaded only at its panel points if its members are to be subject only to axial tension or compression. Also called node.
- pendant post: In a hammer-beam roof, the lower post at the foot of the truss.
- princess post: In a truss, a vertical post between the queen post and the wall to supplement the support of the queen post.
- subdiagonal: An inclined web member joining a chord with a main diagonal.
- truss head: A screw or bolt head having a shallow, spherical shape with a flat bearing surface.
- trussed joist: A lightweight, flat wood truss used in framing a floor, usually prefabricated of 2x4s and 2x6s joined with toothed plate connectors.
- web: The middle plate of a girder or the middle section of an I-beam. 2. A surface framed by the ribs of a ribbed vault. 3. One of the cross walls connecting the face shells of a hollow masonry unit.
- zero-force member: A truss member that theoretically carries no direct load and whose omission would not alter the stability of the truss configuration.
Also see Architecture index.