JP7657261B2 - Truss and truss construction method - Google Patents

Description

The present invention relates to the technical field of truss structure construction, and in particular to trusses and truss construction methods.

The truss structure is a commonly used structure in buildings, and the truss has good load-bearing capacity because the multiple chords of the truss can form multiple triangular structures. In the prior art, for a large truss, the builder usually hoists the multiple chords of the truss to a predetermined height, and then assembles the chords at a high altitude to form the truss. During the construction of the truss, shoring must be used to support the truss or some of the chords of the truss, and in the prior art, a large number of shoring must be used for the construction of a large truss, resulting in low truss construction efficiency and high truss construction costs.

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a truss that is easy to assemble, requires less support work for assembly, and is advantageous in reducing the construction cost of the truss and improving the construction efficiency of the truss.

The present invention further proposes a truss construction method.

In a truss according to an embodiment of the first aspect of the present invention, a lower chord member is installed laterally and has an opposing start and end, and a vertical member is installed vertically and has a bottom end connected to the start end, and a plurality of truss modules are installed, the plurality of truss modules are arranged in the longitudinal direction of the lower chord member, each of the truss modules includes one upper chord portion and one first diagonal member, the upper chord portion is installed laterally, one end of the upper chord portion is connected to the upper end of the first diagonal member, the included angle between the upper chord portion and the first diagonal member is an acute angle, and the different truss modules are arranged in the longitudinal direction of the lower chord member, each of the truss modules includes one upper chord portion and one first diagonal member, the upper chord portion is installed laterally, one end of the upper chord portion is connected to the upper end of the first diagonal member, and the included angle between the upper chord portion and the first diagonal member is an acute angle, and the different truss modules include a lower chord member and a lower diagonal member. The upper chords of the multiple upper chords, each belonging to a vertical member, are connected to each other in sequence at their ends to form an upper chord, the upper chord is installed above the lower chord at a distance, one end of the upper chord is connected to the upper end of the vertical member, and the bottom end of the first diagonal member is connected to the lower chord; and a truss module is installed in multiple second diagonal members, the top end of the second diagonal member is connected to the upper chord, the first diagonal member and the second diagonal member are installed alternately from the starting end to the ending end, and the inclination directions of the first diagonal member and the second diagonal member are opposite to each other.

The truss construction method according to the second embodiment of the present invention includes the steps of attaching the lower chord to the top of the support and installing the lower chord horizontally, connecting the bottom of the vertical member to the start end of the lower chord and installing the vertical member vertically, and attaching the truss modules and the second diagonal members alternately to the lower chord in the direction from the start end to the end end.

In some embodiments of the present invention, the truss construction method further includes assembling the truss module before attaching the truss module to the lower chord, and assembling the truss module includes supporting the first diagonal member using a support frame and installing the first diagonal member at an angle, hoisting the upper chord above the first diagonal member and installing the upper chord laterally, and connecting one end of the upper chord to the upper end of the first diagonal member.

In some embodiments of the present invention, the lower chord includes a plurality of lower chord sections whose ends are connected in sequence, the lower chord further includes a first connecting member connected to the lower chord sections, the first diagonal member and the second diagonal member are both connectable to the first connecting member, and the step of attaching the lower chord to the upper part of the shoring includes the steps of installing a plurality of the shorings and arranging the plurality of the shorings horizontally at intervals, and supporting the lower chord together with the plurality of the shorings and positioning each of the first connecting members above one of the shorings.

In some embodiments of the invention, the step of attaching the truss module to the lower chord for connection to the vertical member includes the steps of: hoisting the truss module to a predetermined height using a crane; welding the bottom end of the first diagonal member to the lower chord and welding the top chord to the top end of the vertical member while maintaining the connection between the crane and the truss module; and disconnecting the connection between the crane and the truss module.

In some embodiments of the present invention, the step of attaching the truss module, which is spaced apart from the vertical members, to the lower chord includes the steps of: lifting the truss module to a predetermined height using a crane; while maintaining a connection between the crane and the currently lifted truss module, welding the truss module currently lifted by the crane to the truss module attached to the lower chord and welding the truss module currently lifted by the crane to the lower chord; and disconnecting the crane from the truss module currently connected to the crane.

In some embodiments of the present invention, the step of attaching the second diagonal member to the lower chord includes the steps of using a crane to hoist the second diagonal member to a predetermined height, welding the top end of the second diagonal member to the upper chord and welding the bottom end of the second diagonal member to the lower chord while maintaining the connection between the crane and the second diagonal member, and disconnecting the connection between the crane and the second diagonal member.

In some embodiments of the present invention, the step of attaching the bottom chord to the top of the support includes the steps of attaching a backing plate to the top of the support and positioning the bottom chord above the backing plate.

The truss and truss construction method of the present invention have at least the following beneficial effects: The upper chord of the truss is formed by connecting multiple upper chords belonging to different truss modules to each other, so that during the assembly of the truss, when the first diagonal member of the truss module is fixed to the lower chord, the truss module can be fixed to the lower chord and the upper chord can also be fixed. As the number of trusses attached to the lower chord increases, the upper chord is gradually formed. Therefore, except for the support for supporting the lower chord, there is no need to install a separate support for supporting the upper chord or the upper chord when assembling the truss, which is advantageous to reducing the support required for the construction of the truss, thereby improving the ease of construction of the truss and reducing the construction costs of the truss.

Additional aspects and advantages of the invention are set forth in part in the description that follows, and in part will be apparent from the description that follows, or may be learned through the practice of the invention.

The present invention will be further described below with reference to the drawings and examples.

FIG. 2 is a front view of a truss in one embodiment of the present invention. FIG. 2 is a schematic diagram of a truss construction method in one embodiment of the present invention. This is a schematic diagram after the shoring has been completed. FIG. 4 is a schematic diagram of the support structure shown in FIG. 3 after the bottom chord has been attached. FIG. 5 is a schematic diagram of the lower chord shown in FIG. 4 after a vertical member has been attached. This is a schematic diagram of the first truss module being assembled with the bottom chord and vertical members. This is a schematic diagram of the first second diagonal member after it has been assembled with the first truss module and the lower chord. 8 is a schematic diagram of the structure shown in FIG. 7 after multiple truss modules and multiple second diagonals have been successively attached. Schematic diagram of the first diagonal member being supported by the support frame. This is a schematic diagram of the upper chord being lifted above the first diagonal member using a crane. This is a schematic diagram after the upper chord and the first diagonal member are assembled to form a truss module. FIG. 1 is a schematic diagram showing how an assembled truss module is hoisted by a crane.

The following describes in detail the embodiments of the present invention, which are illustrated in the drawings, and throughout the specification, the same or similar reference numerals refer to the same or similar elements, or elements having the same or similar functions. It should be understood that the embodiments described below with reference to the drawings are merely illustrative and are for the purpose of interpreting the present invention, and do not limit the present invention.

In the description of the present invention, with regard to the orientation, for example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the illustration, and is merely for the purpose of easily explaining and simplifying the present invention, and it should be understood that it does not indicate or imply that the device or element in question necessarily has a specific orientation or is constructed and operated in a specific orientation, and therefore should not be understood to limit the present invention.

In the description of this invention, some means one or more, plural means two or more, more than, less than, exceeding, etc. are understood to exclude the reference number, and more than, less than, within, etc. are understood to include the reference number. When first and second are mentioned, it should be understood that they are merely intended to distinguish technical features and do not indicate or imply relative importance, or imply the number of technical features indicated, or imply an ordering relationship of the technical features indicated.

In describing the present invention, unless otherwise specified, terms such as installation, mounting, connection, etc. should be understood in a broad sense, and a person skilled in the art can determine the specific meaning of the above terms in the present invention according to the specific content of the technical solution.

Figures 1 and 3 to 8 show a truss in one embodiment of the present invention. The truss includes a lower chord 103, a truss module 205, a vertical member 106, and a second diagonal member 105. In the truss, a plurality of truss modules 205 are installed, and the plurality of truss modules 205 are arranged in the longitudinal direction of the lower chord 103. As shown in Figure 6, the truss module 205 includes a first diagonal member 104 and an upper chord 206.

5 and 6, the truss module 205 is in the shape of a "7", the upper chord 206 is installed horizontally, one end of the upper chord 206 is connected to the upper end of the first diagonal member 104, and the included angle between the upper chord 206 and the first diagonal member 104 is an acute angle. The horizontal installation of the upper chord 206 specifically refers to the upper chord 206 being installed horizontally, and in some other embodiments, the upper chord 206 may be inclined, and the horizontal installation of the upper chord 206 refers to the included angle between the upper chord 206 and the horizontal plane being less than 20°. In the present invention, the definition of the horizontal installation of other chords or chord members is the same as the definition of the horizontal installation of the upper chord 206, and the overlapping description will be omitted below. As can be seen from the comparison of FIG. 1 and FIG. 8, the upper chords 206 belonging to different truss modules 205 are connected at their ends in sequence to form the upper chord member 102.

The lower chord 103 is installed horizontally and is installed below the upper chord 102 at a distance. As shown in FIG. 5, the lower chord 103 includes a plurality of lower chords 201 whose ends are connected in sequence, and further includes an end connector 207, which is connected to one of the lower chords 201 and is located at one end of the lower chord 103. The bottom end of the vertical member 106 is connected to one end of the lower chord 103, specifically, the bottom end of the vertical member 106 is connected to the end connector 207. As shown in FIG. 5 and FIG. 6, the upper end of the vertical member 106 is used to connect to the upper chord 206 of the first truss module 205, thereby realizing the connection between the upper end of the vertical member 106 and one end of the upper chord 102.

As shown in FIG. 1, the first diagonal member 104 and the second diagonal member 105 are both located between the upper chord member 102 and the lower chord member 103, the bottom end of the first diagonal member 104 and the bottom end of the second diagonal member 105 are both connected to the lower chord member 103, and the top end of the second diagonal member 105 and the top end of the first diagonal member 104 are both connected to the upper chord member 102. The inclination directions of one adjacent first diagonal member 104 and one adjacent second diagonal member 105 are opposite. In the present invention, the inclination directions of the first diagonal member 104 and the second diagonal member 105 are opposite to each other, meaning that when the upper end of the first diagonal member 104 is to the left of the bottom end of the first diagonal member 104, the upper end of the second diagonal member 105 is to the right of the bottom end of the second diagonal member 105, and when the upper end of the first diagonal member 104 is to the right of the bottom end of the first diagonal member 104, the upper end of the second diagonal member 105 is to the left of the bottom end of the second diagonal member 105.

If the end of the lower chord 103 for connecting to the vertical member 106 is called the start end (the start end corresponds to the left end of the lower chord 103 in the drawing), and the end of the lower chord 103 opposite the start end is called the end end (the end end corresponds to the right end of the lower chord 103 in the drawing), the first diagonal member 104 and the second diagonal member 105 are installed alternately in the direction from the start end to the end end (see Figure 8). As shown in Figure 8, the first diagonal member 104 and the second diagonal member 105 are installed alternately, which means that one first diagonal member 104 is installed between two adjacent second diagonal members 105, and one second diagonal member 105 is installed between two adjacent first diagonal members 104, from the start end to the end end.

Based on the above truss, the present invention provides a truss construction method, as shown in FIG. 2, the construction method includes:
Step S10 of attaching the lower chord 103 to the upper part of the support 101 and installing the lower chord 103 laterally;
Step S20: connecting the bottom of the vertical member 106 to the beginning of the lower chord member 103 and installing the vertical member 106 vertically;
The method includes a step S30 of alternately attaching the truss modules 205 and the second diagonal members 105 to the lower chord member 103 in a direction from the start end to the end end.

The shoring 101 in the above method can be understood as a frame for supporting a load, and the shoring 101 is an auxiliary tooling commonly used in the construction field, and the structure of the shoring 101 is not specifically described in the present invention. As shown in Figures 3 to 8, multiple shoring 101 for supporting the truss may be installed, and the multiple shoring 101 are installed at intervals in the horizontal direction. After completing the truss assembly and fixing the truss to other parts of the building, the shoring 101 is removed, thereby making the truss a cantilever truss.

The above method can be understood in conjunction with Figures 3 to 8. Figure 3 is a schematic diagram of the support 101, and after the lower chord 103 is attached to the top of the support 101 (i.e., after completing step S10), the relative position of the lower chord 103 and the support 101 is shown in Figure 4 (the lower chord 103 includes an end connecting member 207 and multiple lower chord portions 201). Based on Figure 4, after the vertical member 106 is connected to the lower chord 103 (i.e., after completing step S20), the state of the lower chord 103 and the vertical member 106 is shown in Figure 5. The installation of the truss module 205 and the second diagonal member 105 in step S30 will be described below. 5 and 6, after completing the installation of the vertical member 106, the builder first lifts one truss module 205 above the lower chord member 103, then connects the upper chord portion 206 of the truss module 205 to the upper end of the vertical member 106, and connects the bottom end of the first diagonal member 104 of the truss module 205 to the lower chord member 103. In this way, the truss module 205, the lower chord member 103, and the vertical member 106 are fixed relative to each other. Further, as shown in FIG. 6 and FIG. 7, after completing the installation of the first truss module 205, the builder lifts one second diagonal member 105 above the lower chord member 103, then connects the bottom end of the second diagonal member 105 to the lower chord member 103, and connects the top end of the second diagonal member 105 to the upper chord portion 206 of the truss module 205.

After completing the installation of the first truss module 205 and the first second diagonal member 105, the remaining truss modules 205 and second diagonal members 105 are installed alternately. After the installation of the multiple truss modules 205 and multiple second diagonal members 105, the state of the truss is as shown in FIG. 8. Note that, as shown in FIG. 7 and FIG. 8, except for the first truss module 205 (the truss module 205 connected to the vertical member 106), the remaining truss modules 205 are not connected to the vertical member 106 when installed, but are actually connected to the previously installed truss module 205.

In the prior art, in order to assemble a truss, it is usually necessary to first use shoring 101 to support the upper chord 102 and the lower chord 103, and then attach diagonal members between the upper chord 102 and the lower chord 103. On the other hand, in the present invention, instead of using shoring 101 to support the upper chord 102 above the lower chord 103, the upper chord 102 is formed by assembling multiple upper chords 206 by joining truss modules 205. The construction method of the present invention can omit the shoring 101 for supporting the upper chord 102, thereby reducing the number of shoring 101 used during construction, further reducing the construction cost of the truss, and improving the construction efficiency of the truss.

Further details on the construction method of the present invention are added below.

3, in one embodiment, the lower chord 103 includes a plurality of lower chords 201, each of which includes a first connecting member 202. The first connecting member 202 includes a first weld 203 and a second weld 204, and the bottom ends of the first weld 203 and the second weld 204 are connected, and the top end of the first weld 203 and the top end of the second weld 204 are spaced apart, thereby making the first connecting member 202 "V" shaped. As shown in FIG. 8, the first weld 203 is used to weld to the bottom end of the first diagonal 104 of the truss module 205, and the second weld 204 is used to weld to the bottom end of the second diagonal 105.

In the case where the lower chord 103 includes a plurality of lower chord portions 201, in one embodiment, the above-mentioned step S10 of “attaching the lower chord 103 to the upper portion of the support 101” specifically means:
Step S101: Installing a plurality of shoring structures 101 and arranging the plurality of shoring structures 101 at intervals in the horizontal direction (see FIG. 3 );
The method includes step S102 in which a plurality of supports 101 jointly support the lower chord 103 and each first connecting member 202 is positioned above one of the supports 101 (see FIG. 5).

The first connecting member 202 is used to connect the first diagonal member 104 and the second diagonal member 105, and therefore the first connecting member 202 is the part where the force of the lower chord 201 is concentrated. Installing the first connecting member 202 above one shoring 101 means that the shoring 101 can support the point where the force of the lower chord 201 is concentrated, thus improving the effect of the shoring 101 in supporting the lower chord 103 as a whole, which is advantageous in improving safety during truss construction.

In one embodiment, "attaching the lower chord 103 to the top of the shoring 101" further includes the steps of first attaching a backing plate (backing plate not shown) to the top of the shoring 101, and then positioning the lower chord 103 above the backing plate. By attaching the backing plate to the top of the shoring 101, the elevation of the lower chord 103 can be easily adjusted to meet the positional requirements of the truss. Note that the builder can further adjust the thickness of the backing plate or the number of backing plates to meet the elevation requirements of the lower chord 103.

Before the truss module 205 is attached to the lower chord 103, the truss module 205 needs to be manufactured first. There is no strict requirement on the time sequence of the step of assembling the truss module 205 and steps S10 and S20, for example, the truss module 205 may be assembled after step S20 or before step S10. In one embodiment, the step of assembling the truss module 205 specifically includes:
Step S01 of supporting the first diagonal member 104 using the support frame 303 and installing the first diagonal member 104 at an incline;
Step S02 of lifting the upper chord portion 206 above the first diagonal member 104 and installing the upper chord portion 206 in a horizontal direction;
The step S03 includes connecting one end of the upper chord portion 206 to the upper end of the first diagonal member 104.

The process of assembling the truss module 205 can be understood in conjunction with Figures 9 to 11. The support frame 303 used during the assembly of the truss module 205 is different from the shoring 101 for supporting the lower chord 103. After the support frame 303 supports the first diagonal member 104 (corresponding to step S01), the state of the first diagonal member 104 is shown in Figure 9, where the ground 304 abuts against the bottom end of the first diagonal member 104, and the support frame 303 abuts against the side of the first diagonal member 104 to support the first diagonal member 104. Then, the builder can use a crane to hoist the upper chord 206 above the first diagonal member 104 (see Figure 10), and then connect one end of the upper chord 206 to the upper end of the first diagonal member 104 (see Figure 11). The drawing does not show the whole crane, but only the hook 301 of the crane, the hook 301 hooks the rope 302, the rope 302 is further connected to the truss module 205, the hook 301 can lift the truss module 205 when it rises. When performing step S03, the builder temporarily connects the upper chord 206 and the first diagonal member 104, and when performing step S30 subsequently, the upper chord 206 and the first diagonal member 104 are welded. The temporary connection means can be seen in FIG. 11, the builder can install a temporary connection plate 306 and two manual chain hoists 305, the manual chain hoists 305 pull the upper chord 206 and the first diagonal member 104, and the temporary connection plate 306 is connected to the upper chord 206 and the first diagonal member 104 through a bolt. As shown in FIG. 12, after completing the assembly of the truss module, the builder can use a crane to lift the entire truss module 205 and separate the truss module 205 from the support frame 303. After the truss module 205 is separated from the support frame 303, the truss module 205 is lifted above the lower chord 103 (see FIG. 6).

When the upper chord member 102 is composed of multiple upper chord portions 206, each upper chord portion 206 includes a second connecting member 208. As shown in FIG. 10, the second connecting member 208 is also V-shaped, and the second connecting member 208 includes a third weld portion 209 and a fourth weld portion 210. The third weld portion 209 is used to weld to the upper end of the first diagonal member 104, and the fourth weld portion 210 is used to weld to the upper end of the second diagonal member 105.

In the present invention, the connection means between different chords or chord sections may be set to be welding. In one embodiment, the step of attaching a truss module 205 (the first truss module 205 from the left in Figs. 6 to 8) to the lower chord 103 for connection with the vertical member 106 is as follows:
Step S301: hoisting the truss module 205 to a predetermined height using a crane;
Step S302: welding the bottom end of the first diagonal member 104 to the lower chord member 103 and welding the upper chord member 206 to the upper end of the vertical member 106 while maintaining the connection between the crane and the truss module 205;
This can be achieved by step S303 of disconnecting the crane from the truss module 205.

In the above installation configuration, while the truss module 205 is being welded to the lower chord 103 and the vertical members 106, the crane remains connected to the truss module 205, and the crane provides a certain level of support to the truss module 205, eliminating the need for the contractor to use separate supports 101 to support the truss module 205.

Similarly, the step of attaching the truss module 205 spaced apart from the upright member 106 to the bottom chord member 103 includes the steps of:
Step S304 of lifting the truss module 205 to a predetermined height using a crane;
Step S305: while maintaining the connection between the crane and the truss module 205 currently connected to the crane, welding the truss module 205 currently being lifted by the crane to the truss module 205 attached to the lower chord 103, and welding the truss module 205 currently being lifted by the crane to the lower chord 103;
and step S306 of disconnecting the crane from the truss module 205 currently connected to the crane.

Similarly, the step of attaching the second diagonal member 105 includes:
Step S307 of hoisting the second diagonal member 105 to a predetermined height using a crane;
Step S308: welding the upper end of the second diagonal member 105 to the upper chord 206 while maintaining the connection between the crane and the second diagonal member 105, and welding the bottom end of the second diagonal member 105 to the lower chord 103;
This can be achieved by step S309 of disconnecting the crane from the second diagonal member 105.

By installing the second diagonal member 105 through steps S307 to S309, the crane can provide a certain level of support for the second diagonal member 105, and this has the advantage that there is no need to support the second diagonal member 105 with the shoring 101.

In the present invention, different steps of the construction method are indicated by numbers such as "S10" and "S301", but these numbers are primarily intended to facilitate the explanation of the construction method, and unless otherwise specified, the size of the two numbers does not strictly limit the order of the two steps.

In describing the present invention, references to terms such as "one embodiment," "several embodiments," "exemplary embodiments," "examples," "specific examples," or "examples" mean that the specific feature, structure, material, or characteristic described in combination with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, exemplary references to the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples, as appropriate.

101 Support 102 Upper chord member 103 Lower chord member 104 First diagonal member 105 Second diagonal member 106 Vertical member 201 Lower chord portion 202 First connecting member 203 First welded portion 204 Second welded portion 205 Truss module 206 Upper chord portion 207 End connecting member 208 Second connecting member 209 Third welded portion 210 Fourth welded portion;
301 Hook 302 Rope 303 Support frame 304 Ground 305 Manual chain hoist 306 Temporary connection plate

Claims (7)

A truss construction method used to assemble a truss ,
The truss is
a transversely extending bottom chord having opposing beginning and end terminations;
A vertical member that is installed vertically and has a bottom end connected to the starting end;
a truss module including a plurality of truss modules arranged in the longitudinal direction of the lower chord, each of the truss modules including one upper chord and one first diagonal member, the upper chord being arranged in the horizontal direction, one end of the upper chord being connected to the upper end of the first diagonal member, and an included angle between the upper chord and the first diagonal member being an acute angle, the upper chords belonging to different truss modules being connected to each other at their ends in order to form an upper chord, the upper chord being arranged above the lower chord with a gap therebetween, one end of the upper chord being connected to the upper end of the vertical member, and the bottom end of the first diagonal member being connected to the lower chord;
A plurality of second diagonal members are installed, the upper ends of the second diagonal members are connected to the upper chord portion, the first diagonal members and the second diagonal members are installed alternately from the starting end to the terminal end, and the inclination directions of the first diagonal members and the second diagonal members are opposite to each other.
The truss construction method includes:
Attaching the bottom chord to an upper portion of the support and laterally positioning the bottom chord;
connecting a bottom of the upright to the starting end and vertically installing the upright;
A truss construction method comprising the steps of alternately attaching the truss modules and the second diagonal members to the lower chord in a direction from the starting end to the end end. further comprising assembling the truss module prior to attaching the truss module to the bottom chord;
The step of assembling the truss module includes:
Supporting the first diagonal member using a support frame and installing the first diagonal member at an incline;
Lifting the upper chord above the first diagonal member and laterally installing the upper chord;
The truss construction method according to claim 1 , further comprising a step of connecting one end of the upper chord portion to the upper end of the first diagonal member. The lower chord includes a plurality of lower chords whose ends are connected in sequence, the lower chord further includes a first connecting member connected to the lower chord, and both the first diagonal member and the second diagonal member are connectable to the first connecting member;
The step of attaching the bottom chord to the top of the support includes:
Installing a plurality of the supports and spaced apart the supports horizontally;
The truss construction method according to claim 1 , further comprising a step of jointly supporting the lower chord with a plurality of said supports and positioning each of said first connecting members above one of said supports. The step of attaching the truss module to the bottom chord for connection to the upright member includes:
hoisting the truss module to a predetermined height using a crane;
while maintaining a connection between the crane and the truss module, welding the bottom end of the first diagonal member to the bottom chord and welding the top chord to the top end of the upright member;
The truss construction method according to claim 1 , further comprising the step of disconnecting the crane from the truss module. The step of attaching the truss module spaced apart from the uprights to the bottom chords includes:
hoisting the truss module to a predetermined height using a crane;
while maintaining a connection between the crane and the currently lifted truss module, welding the truss module currently lifted by the crane to the truss module attached to the bottom chord and welding the truss module currently lifted by the crane to the bottom chord;
2. The truss construction method according to claim 1 , further comprising the step of: disconnecting the crane from the truss module currently connected to the crane. The step of attaching the second diagonal member to the lower chord includes:
Lifting the second diagonal member to a predetermined height using a crane;
while maintaining a connection between the crane and the second diagonal, welding an upper end of the second diagonal to the upper chord and welding a bottom end of the second diagonal to the lower chord;
The truss construction method according to claim 1 , further comprising the step of disconnecting the crane from the second diagonal member. The step of attaching the bottom chord to the top of the support includes:
Attaching a backing plate to the upper part of the support;
The truss construction method according to claim 1 , further comprising the step of: placing the bottom chord above the backing plate.