Abstract:
A structural engineered wood rim board for light frame construction having joinery slots in a flange, a portion of a light frame construction building constructed from structural engineered wood components including a structural wood rim board for light frame construction having an exterior-facing cavity, a structural engineered wood rim board corner system for light frame construction, and a light framing building method using a structural engineered wood rim board are disclosed.
Abstract:
Der SBH- oder KVH-Träger (2) enthält mindestens ein einseitig exzentrisch eingeklebtes, unter Zugspannung stehendes Verstärkungsband (1) aus einem Faserverbundwerkstoff. Er erleidet vor seiner Belastung eine Durchbiegung infolge der internen Vorspannung des Verstärkungsbandes (1). Diese Durchbiegung beträgt 1/1000 bis 1/300 der Länge L des Trägers (2), weil die Vorspannung des Verstärkungsbandes (1) in der Träger-Längsmitte (7) höher ist als in den Träger- Endabschnitten. Das Verfahren zur Herstellung geht so, dass auf der auf Zug zu belastenden Seite des Trägers für jedes einzuklebende Verstärkungsband ein Schnitt für die Aufnahme des Verstärkungsbandes (1) eingebracht wird. Hernach wird von der Längsmitte des Trägers aus jedes Verstärkungsband über dieselben parallelen Abschnitte mit von Abschnitt zu Abschnitt nachlassender Zugspannung mittels Einpressens von Klebstoff mit dem SBH- oder KVH-Träger verfestigt. Die Produktionsanlage besteht aus einer Einrichtung zum Einspannen von stehend parallel zueinander verlaufenden Verstärkungsbändern und zum Erzeugen einer Zugspannung von 20kN bis 180kN über einen frei bleibenden Teil von mindestens 4 Metern Länge.
Abstract:
An I-joist is provided comprising a first and a second flange interconnected by a webstock; the first flange has a first major surface upon which is formed a groove, so that the groove faces and receives the webstock; and a fiberous re-enforcing material impregnated with adhesive resin disposed in the groove.
Abstract:
Um die Tragfähigkeit von Schalungsträgern bei stossartigen Beanspruchungen, insbesondere quer bzw. schräg zur Längsachse des Trägers, zu verbessern, stellt die vorliegende Anmeldun einen Schalungsträger bereit, der im wesentlichen aus Holz besteht und einen Obergurt, einen Untergurt sowie einen diese verbindenden Steg aufweist. Es ist vorgesehen, dass der Steg und/oder zumindest einer der Gurte zumindest in einem Endbereich des Trägers mindestens eine Ausnehmung aufweist, die mit einem Füllmaterial gefüllt ist, das stossdämpfende Eigenschaften besitzt. Ferner stellt die vorliegendeAnmeldung ein Verfahren zum Herstellen eines derartigen Schalungsträgers bereit.
Abstract:
The invention falls within the sector relating to techniques for the construction of prestressed structures and may be applied within the area of civil engineering. With the method according to the present invention a prestressed structure (1) is made, which structure comprises a primary structure (5) and one or more tendons (7). The primary structure (5) comprises two or more glued laminated timber beams (5a), two terminal elements (5b) and one or more deviating elements (5c, 5d, 5e). The one or more tendons (7) apply to the primary structure (5) forces which are due to the tensioning of the one or more tendons (7), performed during the construction of the prestressed structure (1), and to the loads (4) applied to the said prestressed structure (1); the abovementioned forces produce bending in the primary structure (5), inducing in the said primary structure (5) a compressive normal force.
Abstract:
According to the present invention, the invention provides a deformation-resistant log plank in which: a drill hole (11) reaching from one end to the other end of a log plank body (10) is formed; and a core (20), which corresponds to said drill hole (11) in terms of thickness and length, is inserted and fixed to said drill hole (11). The log plank of the present invention can effectively prevent a bending deflection, and thus, by using such an effect, it is possible to manufacture timber products which are strong and have excellent durability even when thin, such as floor boards, hardwood furniture, windows and doors and the like, and further, manufacturing costs can be remarkably reduced when compared to conventional log planks.
Abstract:
An I-joist is provided comprising a first and a second flange interconnected by a webstock; the first flange has a first major surface upon which is formed a groove, so that the groove faces and receives the webstock; and a fiberous re-enforcing material impregnated with adhesive resin disposed in the groove.
Abstract:
In a structural element in the form of a glued wooden beam (6) with prestresses reinforcement at least one reinforcing element (7) is provided in one or more longitudinal grooves (8) which extends parallel with the side edges of the beam (6) and preferably across the whole length of the beam. The at least one reinforcing element is formed by a reinforcing moulding compound which is provided in the grooves (8) with the glued wooden beam (6) prestressed in the cross direction towards the top surface, whereafter the reinforcing moulding compound is hardened and prestressed in compression when the glued wooden beam is relieved. Correspondingly also the bottom surface of the beam can be provided with at least one reinforcing element (7’) of this kind, provided in a similar manner to the at least one reinforcing element (7) of the top surface, but prestressed in tension. The glued wooden beam (6) hence becomes reinforced symmetrically on two sides. The reinforcing moulding compound can be a hardenable composite material, a hardenable polymer or ceramic material and may in each case comprise a reinforcing additive, preferably in the form of fibres.
Abstract:
The object of the invention is an element composed of wood pieces (2a, 2b, 2c). Glueing compression is carried out by bands (4) fitted permanently in the element in order to reduce tension stresses or at least to bind the pieces before the glue gets hard. In the middle portions (2c) of the element waste wood of the wood industry is used.
Abstract:
An elongated wood structural member or beam (10) for bearing predetermined loads (16) transverse to the lengths (54) of the members preferably includes multiple elongate wood segments (12) bonded together with their lengths generally aligned with the beam length as in a glue-laminated members. The predetermined load corresponds to a resisting moment that produces compressive and tensile stresses in the structural member in respective compression (18) and tension (20) portions of the beam on opposite sides of a neutral axis (22). A synthetic tension reinforcement (28) having multiple synthetic fiber strands held within a resin matrix is adhered to at least one of the wood segments in the tension portion of the structural member and is selected to be substantially capable of bearing the tensile stress produced by the resisting moment and cooperates with the wood segments to position the neutral axis within the beam. As a result, the width and depth of the structural member and relative positions of the neutral axis and reinforcement (29) may be selected to establish a compression portion of the structural member in which compressive stress from the resisting moment does not exceed a predetermined maximum compressive stress.