FI119144B - Finger joint, finger joint group and grid using finger joint or group of fingers - Google Patents

Description

119144

Finger joint, finger joint group and grid with finger joint or finger joint

The invention relates to a bull joint according to the preamble of claim 1.

The invention also relates to a finger joint group according to the preamble of claim 14.

The invention further relates to a lattice according to the preamble of claim 16.

In the construction of lattice structures used in the construction industry, finger joints have recently been used instead of the traditional nail joints. The lattice structures consist of upper and lower arches and diagonals connecting them. and finger joints generally connect the ends of the diagonals to the longitudinal edges of the chords.

10 However, the main problems with current finger joints are the difficulty of fabricating finger joints and structural weaknesses of the joint, which include poor lateral rigidity.

The object of the invention is to overcome the drawbacks of the prior art. Thus, it is a primary object of the invention to provide a finger joint for joining wood pieces which is strong and sturdy but at the same time easy to manufacture.

. . The finger joint of claim 1, the finger group of claim 14, and the grid of claim 16 achieve the above objectives.

***: 20 The finger joint according to the invention has a first and a second piece of wood to be fitted. • · ·, ··· the finger joint areas in these wood pieces. broking. The finger joint region of at least the second piece of wood is an extended finger joint area extending beyond the finger joint between said pieces of wood, or at least a second, in addition to the finger joint region, the wood body has an additional finger joint region at least # · * *. • · * ·; · ', with different edges of the piece of wood. A support piece with a finger joint area is provided on the extension or extension finger joint region to support said,; * * *: finger-jointed pieces of wood.

In the finger joint according to the invention, the first and second wood pieces are arranged: # *. I 30 for mutual attachment through the finger joint areas in these wood pieces. The finger jointing area of at least the second piece of wood is an extended finger jointing area extending beyond the 2,119,144 finger jointing between said pieces of wood. On the extension part of the extended finger joint area is provided a support piece having a finger joint area, which supports the wood pieces connected by a finger joint.

The finger joint group according to the invention, in turn, has at least two finger joint members according to the invention. The group comprises extended finger joints in the longitudinal edge of the wood body, substantially at the same joint, with finger joints from the finger joint areas at the ends of these wood bodies.

By "finger joint" is herein meant a set of finger joints formed on the same wood piece extended finger joint area 10, wherein wood pieces connected to the finger joint extended finger joint area are in contact with or close to each other at least in the joint area.

Further, the lattice according to the invention has at least one upper bar and at least one lower bar and a plurality of diagonals connecting these to the upper and lower bar by a finger joint or a group of finger joints according to the invention.

The basic idea of the invention is to form a finger joint between two pieces of wood so that at least one of the finger joint areas to be joined by the finger joint is an extended finger joint area.

When finger joints are formed between the finger joint areas, a support piece is inserted on the junction of the extended finger joint area to support the wood pieces that are • • # 20 connected to each other by the finger joint. To produce a finger joint, the extended finger joint region is extended to extend on the surface of the body longitudinally, either to one end of the body or to the next finger joint. The length of one or more supports is dimensioned to cover the extension of the extended finger joint region along its entire length. Particularly in the manufacture of lattice structures, the support is preferably machined by first forming a finger joint region along its entire length and cutting the support into pieces of suitable length. An alternative way of forming a finger joint according to the invention is to use two pieces of wood connected by finger jointing at each other. ** ·. an additional finger joint area is formed adjacent to the joint where the piece supports the joint. The finger joint group according to the invention, in turn, consists of a plurality of finger joints according to the invention formed at the same point on the longitudinal side of the wood body having an extended finger joint region.

• ♦ • · «; ·] The advantage of the finger joint according to the invention is its considerably stiffer structure compared to prior art finger joints, since the support member supports wood pieces joining with the finger joint 3 119144. The stiffness is further enhanced by the fact that the field, being.

Another major advantage of the finger joint is its ease of manufacture, since a finger joint area extending over its entire length can be milled into a piece of wood, whereby the pieces to be joined by finger-5 joints and the joint supports.

In a preferred embodiment of the invention, the two pieces of wood are secured to one another by a T-finger joint (head-to-side joint) supported on each side of the joint by additional attachments connected to an extended portion of the finger joint area of the other wooden body. T-finger joint refers herein to a joint in which the end of the second elongated piece of wood having a sor-10 militia region is connected to a generally extended finger-joint area on the side of the second piece of wood.

In another preferred embodiment of the invention, the two pieces of wood are secured to one another by an L-finger joint (head-to-side joint) supported on one side by an additional piece connected to an extended portion of the finger joint area of the other piece of wood. 15 The term "L-finger joint" refers to a joint in which the end with a finger joint area of one elongated wood piece is connected to the generally extended finger joint area on the side of the second wood piece, to one end of the extended finger joint area.

In another preferred embodiment of the invention, the ends are angled. the joint between the pieces of wood is supported by a support piece which is • · · * .. 1 20 approximately triangular in shape. The two adjacent sides of the support piece are • • · · 'connected via a finger joint to the junction of the wood pieces that are attached to each other, to the additional finger joint area on each piece.

Among the additional advantages achieved by the invention, the following may be noted: In accordance with the invention. the finger joint is easy to fabricate into the various lattice structures used in the construction industry since no special tools are required to form the finger joint. Biscuits. . The finger joint according to the invention is easy to manufacture but is not prone to dirt • ♦ · because the extended finger joint area remains under the support. Due to the structure of the sorption, the sorption • · * ··· 1 according to the invention, no water collecting depressions remain in its area.

• · • · ···

"Finger joint", as used herein, means a joint formed between two "" pieces of wood in the finger joint areas of said wood pieces.

· • · · · · · · · 4,119,144

For purposes of this application, the term "finger joint" refers to a joint formed on a surface of a piece of wood with a plurality of ridges (fingers) spaced apart. Two adjacent parallel ridges are separated by a groove.

In this application, the extended finger joint area means the finger joint area extending beyond the finger joint of two pieces.

In this application, a piece of wood is understood to mean not only solid wood but also pieces of glulam or solid wood, but also pieces containing wood fiber, such as MDF, HDF and particle board, and plywood.

In the following, the invention will be illustrated in more detail with reference to the accompanying drawings.

Figures 1A and 2B show a perspective view of the formation of a T-joint between two pieces of wood.

Figures 2A and 2B show a perspective view of forming an angular connection between two pieces of wood.

Figures 3A and 3B show a perspective view of the formation of a K-joint of a finger joint group for use in lattices.

. . Figures 4A-4C are side elevational views of the roof grille and finger joints in the roof grid.

• φ * • · ·

Figures 5A and 5B are perspective views showing the formation of a flat grid with fingertips.

In the following, the features of the invention which are illustrated in detail by the figures, and the structures shown in the figures, are discussed in more detail.

Figures IA-IB and 2A-2B illustrate a basic finger joint 1 according to the invention, wherein: ···, the joint comprises two elongated planed wood pieces 11, 12 · · ”25 and a support piece 15 supporting the joint between them.

# φ φ Φ M Φ. **. In the exemplary embodiment of Figures IA and IB, an oblique T-finger joint 1 is formed; # # φ 100 between two elongated planed, square cross-sections a φ, 11, 12. In the first piece of wood 12, the finger joint region 20 is located at the end of the piece *. **: which is slightly bevelled. The finger joint region 20 is substantially flattened and of length at the end. The second piece of wood 12 has a finger joint region 200 extending by a narrower longitudinal edge of the piece. The extended finger joint region 200 is substantially the length and width of the narrower longitudinal edge. The fingers of both the finger joint region 20 and the extended finger joint region 200 are per se conventional in shape and are formed by milled parallel shear-shaped formations with grooves between them. The parallel bristle formations, the fingers, are always at the same distance from each other and extend from end to end of the finger joint region 20 or the extended finger joint region 200. Between two adjacent ridges la there is a groove Ib with a space for glue at the bottom. The relationship between the height (calculated from the bottom of the groove between adjacent fingers) in the finger jointing area 20 and the extended finger jointing area 200 and the shape and width of the fingers is such that the fingers of the finger jointing areas 20, 200 can be overlapped in the space containing the glue at the bottom of the groove of the finger joint area or near the bottom. The width of the finger joint areas 20, 200 is the same but the finger joint area 20 at the end-15 of the end piece 12 is shorter than the extended finger joint area 200 on the side of the second piece of wood 11; the length of the finger joint area 20, 200 refers to the length of the fingers la in the finger joint area. As shown in Figures 1A and 1B, the finger jointing area 20 at the end of the end piece 12 is joined to the extended finger joint area 200 of the second piece 12 so that the fingers of the extended finger joint area 200 continue to form the oblique T-joint area 1; 100 outwardly in the longitudinal direction of a piece of wood with a finger joint area 200 extending in each direction. These portions of the extended finger joint area 200 outside the finger joint 1 are called the finger joint extension 200a. Outside of the T- · · · joint shown in Figure 1, two extension finger joint 200a now remain; 200a ', • · · U. 25 200a'. Extension for parts 200a 'and 200a' can now be fitted with longitudinal and wide rib-like support members 15 of said extension parts; 15 ', 15' finger joint 20; 20a between them. The ends of the support pieces 15 are bevelled at the same angle as the ends of the first piece 11 to be joined from the end, and the surfaces of the support pieces 15 '15 "j which are placed are provided with finger joint areas 20; 25. In this case, when fastening the ί, ί, ί 30 brackets 15 'and 15' to the 200a 'and 200a' extension joints, the bracket -: ***: the fingers in these brackets and the ends of the said brackets 15 'and 15' . can be set end to end at T-joint 1; 100 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The T-joint 1 thus formed; 100 Supporting members 15 'and 15' attached to both sides of the model • stiffen joint 1; 100 effective ϊβΓ *: 35 longitudinal sections of wood with a finger joint 200 extending 200.

; * ·. · Both finger joints between the joint parts 200a and the support member 15 of the jointed finger joint area • · 20; 20a that the joint between the end of the support piece and the longitudinal edge 6119144 of the end piece 11 to be joined may be further strengthened, for example, by gluing. This provides an additional bonding surface relative to the conventional T-finger joint, thereby enhancing the strength-enhancing effect of the support member 15 T-finger joint 100.

2A and 2B, two elongated 11; 1Γ, 11 ”5 pieces of wood are connected to each other at their corners. At the ends 1a of the wood pieces 11 to be joined at an angle, there are finger jointing areas 20. Their longitudinal lower edges 1 Ib also have an additional finger jointing area 210 which starts at the end from a restricted lower edge. In the additional finger joint areas 210 at the longitudinal lower edges 11b, a triangular support piece 15 supporting the angular joint is secured with the finger joint 1; 15a.

10 Now the pieces of wood Π; 1Γ, 11 ”end finger joint 1; le is formed between the ends 11a, 11b of said pieces of wood, which is why finger joints areas 20 are formed at these ends 1a, whereby the fingers overlap each other to form a finger joint le. The thus formed end angle joint of each of the wooden pieces 11; 11 11 "additional finger joint areas 210 are formed at the narrower lower edge Ib of the 11"; 210 ', 210'. The additional finger jointing region 210 begins with the pieces of wood 11; 1 le, 11 ”from the left side of the angled finger joint, extends to the other end of the lower edge of each piece. The additional finger joint areas 210 have the same width as the lower edges 11b of the pieces 1Γ, 11 ”. The additional finger joint regions 210 can now be provided with a triangular support piece 15a having adjacent sides formed with finger joint regions 25; 25 ', 25', with fingers la overlapped with wood pieces ϊ, * · | a finger joint 1 on the fingers of the additional finger joint areas 210; 101 for forming an additional piece and attachments 11; 1Γ, 11 ”. Figures 2A and 2B show only a portion · * · *; of the attachment to illustrate the joint, in fact the sides of the attachment are. * * \ end pieces 11 to be joined together; 11 ', 11' long and wide at the lower edges Ib, 25, whereby they cover the additional finger joint areas 210 milled at the lower edges; 210 ', 210'. Such a joint can be used, for example, in the part of the grid which is • • shattered on the roof, with the support piece 15; The 15a becomes an effective forefinger angular finger. . Flour 1; torque caused by forces perpendicular to the joint.

Figures 3A-3B illustrate one embodiment of a group finger joint 10 according to the invention. 30 shapes, which are typically used in roof trusses. By "group finger joint 10" herein is meant finger joints 1 formed between the same first piece of wood and two or more than: V: more other pieces of wood at the same finger extension area 200 of the first piece of wood;

the other pieces of wood are in contact with each other at least at the joint. 3A

35 illustrates the components of the group finger joint, i.e., the lower arm 11b, the diagonals 12a and the 7119144 support members 15 before assembling the group finger joint 10 and in Figure 3B the finished group finger joint. Chord and diagonals are referred to herein. commonly used terms in the construction industry.

Fig. 3A shows an extended sormetal region 200 formed by milling at the upper longitudinal edge of an elongated, rectangular or square-shaped lower shoulder 1 Ib extending substantially from end to end of the lower shoulder 11b. The width of the finger joint area 200 is substantially the same as the width of the upper edge of the lower arm 11b. To the end shown in Fig. 3A of the extended finger joint region 200 of the lower arm 11b, two short diagonals 12a of approximately square cross-section may be connected at their ends; 10 12a ', 12a' K-group finger joint 10; 10a between the lower arm 11b and the diagonals. The width of one edge of the cross-section of the diagonals 12a is the same as the width of the upper edge 11b of the lower arm 11b and of the diagonals 12a; 12a ', 12a' ends 12a2 are provided with suitable finger jointing areas 20 for connecting the diagonals to lower (11b) finger jointing area 200 corresponding to the lower shoulder 11b. The main flank 1A and 1B of the diagonal ends 12a ', 12a' T-finger joint 100 or L-finger joint 110. In this case, the first of the diagonals 12a 'is connected at its end to the extended finger joint area 200 on the subarctic lb, just to the end of the finger joint area 200, at right angles to the L finger joint 110 and the other of the diagonals 12a' from an angle of 20 to a different angle, for example a 45 degree angle with a T-joint 100 (cf. Fig. 1). Diagonals 12a; ι ·>. 12a ', 12a' are joined to the lower shoulder by the extended finger joint region 200 side by side so that they · · · I .. * touch each other at least at the junction of the diagonals 12 and the lower shoulder 11b.

• · · • ♦ ·: T: While the lower arm 1 Ib and the above diagonals 12 ', 12 ”are interconnected by L and T finger joints, the lower arm is attached to the extended finger joint area 200, chord and diago ···. 25 female K-group finger joints 10; 10a for the external extension 200a in cross section • · · .1 ·. inserting a rectangular elongated support piece 15 supporting the K joint, the end of which is shaped to conform to the shape of the K group finger joint 10a. The support member 15 is substantially the same as the joint shown in Figures IA and IB. In this case, its entire longitudinal longitudinal mandrel 15a has a finger joint region 25 and a width of the lower surface 15a of the lower part 15a of the support member 15, which faces the lower arch 11b to the lower arch 11b. Furthermore, the length of the support piece 15 is such that the support piece covers the extension 200a of the extended finger joint region 200 on the upper surface of the lower arm 11b, which remains outside the ♦ · · 1 * of the K-group finger joint 10; 3A and 3B also show the connection of the other end of the ♦ · · 35 diagonal 12a; 12a 'attached to the end of the lower arm 11b by the angled T-finger joint 1; 8 119144 100 to the extended finger joint region 200 and the two support members 15; 15', 15 ' 101 to the upper chord 11a, to the extensions 200a; 200a ', 200a' of its extended finger joint 200, which are located on both sides and the T-finger joint formed by the shoulder 1a and its diagonal 12a '. In Fig. 3A, for the sake of observation, one of the supports 15 ", which is shown in Fig. 3B, is omitted in the finished T-finger joint 100. The T-joint between the upper chord and the diagonal is similar to that already described with respect to Figs.

Figures 4A illustrate a (roof) lattice 3; 30, wherein the chords 11a, 1b and the diagonals 12a are interconnected by the finger joints 1 and the finger joint groups 10 according to the invention. 10 In the lattice 3; 30 are at their respective angles at their ends by an end finger joint 1; two upper beams 11a attached to le; 11a ', 11; 11a ", lower bar 1 Ib at both angles of each upper chord 11a ', 11a" and lower bar 1 Ib and upper chambers 11a; 11a ', 11a' diagonals connecting these. The lower sections 11b, the upper sections 1a and the diagonals 12a are all substantially square or bog-15 and the edges of the sections have the same length, at least with respect to the interconnected surfaces of the sections and diagonals. The lower arch 11b and the upper arches 11a form a triangular grid with connecting diagonals 12a of different lengths.

Lattice 3; 30 joints are rafters 11a 'and 11a "and diagonals 12a 20 finger joints 1, items al, a2 otherwise similar to that of Figure IA and IB are described in T between * **. Finger joints, except that the T-finger joint 100 on both sides of the support piece • · · V · first 15; 15 'extending in a direction parallel to the upper chord as far as its end and one of the following: T-finger joint support members 15; The 15 ”extends to the following upper pole and dia-: *": gonal finger joint group 10; 10c.

The lattice K-finger joints 10; 10a, illustrated in greater detail in Fig. 4B, between the lower arch 1b and dia- * ***** gonal 12a and the upper arch 1a and diagonal 12a are otherwise the same as those described in Figs 3A above. and 3B except that the elongated support piece 15; 15 'supporting the K-group finger joint 10; 10a at the end of the grid lower arm 11b now extends to the next group finger joint 10, 10b between the diagonals 12a and the lower arm 11b. Up to 30.

* ... * in the group finger joint 10 of Figure 4C; 10b, at the same location, three diagonals 12a, 12a; ', 12a ", 12a'" · · are connected at the same location to three diagonals 12a, 12a; ', 12a ", 12a' ', forming a group finger joint 10; 10b. Each diagonal 12a; 12a ', 12a', 12a '' the joint between the end finger joint region and the extended 9119144 finger joint region at the lower trunk is otherwise similar to the T joint shown in Figure 1 except that the group finger joint 10; 10b is provided to support a support piece parallel to the lower arm 11b on each side of the group finger joint. The supports are again of the same width in width as the lower bar and are secured to the extension 200a outside the group finger joint of the finger jointing area Ib of the lower section 5 Ib, but the said support members extend only to the next diagonal and chord joint.

Figures 5A and 5B illustrate a flat grid 3; 40 between the upper and lower arcs 11a, 11b and the diagonals 12a connecting these 10. In the rectangular grid 40, the lower and upper ribs 11a, 11b are rectangular in cross-section such that they are wider in their facing horizontal surfaces than in their vertical edges. The diagonals 12a connecting the upper and lower arms 11a, 11b are often narrower in this grid type than the horizontal edges of the chords 11a, 11b. Then, on the upper surface of the lower chord 11b and on the lower surface of the upper chord 11a, extending finger joint areas 200 having the same length as the corresponding chords 11a, 11b but narrower than the width of the upper and lower surfaces of the chords are milled. In the width direction of the ribs 11a, 11b, the width of the extended finger joint areas 200 milled in the middle thereof corresponds to the edge width of the diagonals 12a of square cross-section. The extended finger joint areas 200 of the upper and lower arms 11a, 11b are joined by diagonals 12a of the finger joint areas at their ends.

. Between the diagonals 12a and the finger joints between the lower and upper arch 111, 11b and the plurality of finger joints 10 between the diagonals and the upper and lower arches, differently shaped upper and lower arch members 15 are disposed. * · * ** again with the extension 200a of the extended finger joint areas of the upper or lower arch. For example, nail plates may be attached to the top bar 40 of the flat grid 40 of Figure 5 · · · 25 • · · · * * ·

The lattice of both Fig. 4A and Fig. 5B is made by adding an adhesive such as pre-. . denotes a construction adhesive classified in the lattice structure for the extended finger joint areas 200 of the ribs 11a, 11b and the finger joint areas of the diagonals 12a and the support members 15, at the bottom of the grooves. The finger joint areas and the finger joint areas of the support pieces are then placed at the ends of the diagonals 12a in the extended finger joint areas 200 and finally the chords 11a, 1 Ib are pressed towards each other.

All finger joints 1 and group finger joints 10 illustrated in the figures are stronger than normal finger joints because an additional piece 15 provides additional bonding surface area. If the finger joint 1 does not remain visible, it is easy to make it very strong, since the complete support member 15 can be made to the desired shape, taking as its starting point only the reinforcement of the joint structure. The structural aspects of the support itself do not greatly limit the reinforcement of the joint if aesthetic considerations need not be taken into account; the support need only cover the extension 200a of the extensible finger joint region at least one piece, or the additional finger joint region 210 extending at least one, preferably two pieces, between the finger joint areas, otherwise its shape, dimensions and structure may be designed to be freely supported by finger joint connected songs. Thus, for example, the height of the support member 15 can vary quite freely depending on the application 10 and the strength desired for the joint.

Only some embodiments of the invention have been described above, and it will be apparent to one skilled in the art that the invention is possible in many other ways within the scope of the inventive idea set forth in the claims.

Accordingly, the lattice according to the invention can be used, inter alia, in roof lattices, under-15 or bottom lattices in bridges, piers, pergolas, tarpaulin frame structures, composite board beams, aesthetic structures and fire rated structures.

The joint according to the invention is easy to manufacture in mass production because it does not require any special machines. The most commonly used production tools for lattice assembly are, for example, a planer, a cutter, and a miller for planing surfaces, diagonals, and support plates, milling surfaces, and cutting • • milled pieces.

In addition to the aforementioned finger joint bonding, the structure can also be reinforced with nails, level pins, screws, support plates, etc.

• · · • · ·. ···. For mass production of trusses, it is easy to fabricate the support by milling it into long • · 25 pieces and then cutting the support into suitable pieces.

· 1 1 1 1 1 1 1 1 1 1 1 1 ♦ ♦ 1 ♦ ♦ ♦ ♦ ♦ «« «« « • · · ♦ ·· • ·

Claims (19)

Finger joint (1) with which a first (11) and a second piece of wood (12) can be adapted in mutual engagement by mediating the finger joint zones (20) present in these pieces of wood, characterized in that - at least one of the pieces of wood (11, 12) ) joint joint zone (20) is an elongated joint joint zone (200) extending beyond the joint joint (1) between said wood pieces, or at least one piece of wood in addition to the joint joint zone (20) further comprises an additional joint joint joint zone (210), immediate proximity of the joint joint zone (20) between the first and the second piece of wood, at different edges of the piece of wood - on the extension portion (200a) of the extended finger joint zone (200) or on the additional finger joint zone (210) is arranged one with a joint joint joint (20). seen support piece (15) supporting said wood piece (11, 12) joined together by finger joint. Finger joint zone (1) according to claim 1, characterized in that the extension part (200a) of the extended finger joint zone (200a) extends on the surface of the piece of wood (11, 12) from the finger joint (1) to the other end of the wood piece and / or to the adjacent end. . ·. : sewing finger joint between this piece of wood (11 or 12) and a third piece of wood. • * · ·· ♦ • · · ♦ · · Finger joint zone (1) according to claim 1 or 2, characterized in that the elongated joint joint zone (200) runs along a longitudinal edge of the wood piece and its width is the same as the width of the edge or narrower than the width of the edge. • · · • · · ··· * ·· Finger joint zone (1) according to any of the preceding claims, characterized in that the width of the support piece (15) is substantially the same as the width of the extension portion (200a) of the extended finger joint zone (200). • · · • · • * ··· /. Finger joint zone (1) according to any one of the preceding claims, characterized in that the same support piece (15) is adapted to support two successive finger zones (1; Γ, ♦ ♦ ··· * 1 ") located at a mutual distance from each other, which joints are formed between wood: V: 35 (11) provided with the extended joint joint zone and two other pieces of wood. • · • ♦ · • · ♦ • «119144 Finger joint zone (1) according to claim 4, characterized in that the support piece (15) is adapted to support the joint site between two pieces of wood (11, 12) adapted at an angle relative to each other with a T or L finger joint (1a, 1b). ). Finger joint zone (1) according to claim 6, characterized in that the longitudinal canyon of the lower end of the mutually adapted wood pieces (11, 12) has an extended finger joint zone (200) in the joint area. Finger joint zone (1) according to claim 7, characterized in that the wooden pieces joined at an angle with an end-side T-finger joint (1; 1a, 1; 1b) are adapted to be supported by two support pieces (15a, 15b), which are located on opposite sides of the joint, on extension parts (200a; 200a ', 200a') of the extended finger joint zone (200). Finger joint zone (1) according to claim 6, characterized in that the wooden pieces joined at an angle to an end-side L-finger joint (1; 1b) are adapted to be supported by a support piece (15a) located on the extension of one of the wooden pieces. finger joint zone (200), on its extension portion (200a). Finger joint zone (1) according to any of claims 6-9, characterized in that the support piece (15) has a square cross-section and that it is clamped with a finger joint (1) at the extension part (200a) of the wooden piece provided with a finger joint. Zone (200) and that it supports the piece of wood that is connected to this piece of wood at an angle through the mediation of its end edge. * · · 25 11. Finger joint zone (1) according to claim 1, characterized in that the support piece (15) has a largely triangular cross-section and that its two adjacent sides are connected by means of mediation. of the finger zone (1) to the joint site between wood pieces (11, 12) which are clamped end to end, in the additional finger zone tree (210) in both pieces: V: 30. it · • · · ··· X. Finger joint zone (1) according to claim 2, characterized in that the support piece (15) is shorter than the extension part (200a) of the finger zone area (200). • S ··· ϊ.ί.ί 35 Finger joint zone (1) according to any preceding claim, characterized in that there is a space for adhesive in the finger joint zone (20) of the lower wooden piece 119144 (Π, 12) and / or in the finger joint zone (25) of the base of the groove between the fingers. . Finger joint group (10) having at least two finger joints (1) according to claim 1, characterized in that the group comprises a piece of wood (11), wherein a number of wood pieces are substantially clamped at the same location with finger joints (1) at the finger joint zones (20). ) at the end of these pieces of wood, in the extended finger joint zone (200) located on the longitudinal edge of the piece of wood. Finger joint group (15) according to claim 14, characterized in that two or three pieces of wood have been clamped at their same longitudinal point on the extended finger joint zone / finger joint zones of the wood piece by mediating finger joint zones (20) at their ends. Truss (3), characterized in that the truss comprises at least one upper frame (1a) and at least one lower frame (1b) as well as a number of diagonals (12a) joining them which are clamped to the upper and lower frames. with a finger joint (1) or finger joint group (10) according to any of the preceding claims. Truss (3) according to claim 16, characterized in that it comprises two upper frames (11a) at an angle relative to each other and a lower frame (11b) provided, either directly or indirectly to the free ends of the upper frames. and diagonals (12a) which • M. ·; · [join the upper frames and the lower frame. • · · · · · · Truss (3) according to claim 17, characterized in that it comprises two parallel frames (11a, 1b) joined by a plurality of diagonals (12a). Use of a truss (3) according to any of claims 16-18 as a roof truss, bottom or intermediate truss, as a cooperating slab in: We provide a bridge, in a bridge, in pergolas, in the frame structure for a hali. * ·· * 1 • · • · • · 1 • tt * · · »· • 1 • · ··· • · 1 1 • · t • · · * ·« • ·· • 1