JP2000177791A - Transportation method for construction material, and tent for transporting construction material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make transportation, storage and protection of construction materials simply and appropriately by a method wherein necessary construction materials only are brought into a transportation tent, and after the tent for transportation is mounted on a transport means and transported to a construction site of a dwelling, the tent is lowered from the transport means to the ground of the construction site. SOLUTION: Assembly of a transportation tent is made at a factory manufacturing construction materials A, and supports 41, 42 are erected on a frame- shaped hanging frame 21 and the supports are connected with one another with guardrails 7. The lower ends of arch members 81, 82 are inserted into the upper ends of the supports 41, 42, and pins of connecting rails 85 are inserted into holding pieces of the supports and the arch members. Furthermore, a tent frame 2 is entirely covered with a tent canvas. Then necessary construction materials only are brought into the transportation tent. Ropes are passed to flanges 22 provided at the hanging frame 21, and the tent is hoisted with a crane and transferred to a truck. After that, the tent is transported by trick to a construction site and unloaded on the ground with the crane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting building materials to a building site of a house and a tent for transporting building materials used in the method. In particular, the present invention relates to measures for simplifying the work of transporting building materials.

[0002]

2. Description of the Related Art Conventionally, in building construction of an industrialized house, various building materials produced in a building material production factory are transported to a building site according to the stage of the building work. For example, at the stage when the foundation work, roof work, and exterior work of a house are completed, building materials such as floor finishing materials and interior materials are transported from a production factory to a building site by trucks on a plurality of pallets. You.

[0003] The building materials transported to the building site are unloaded from the truck and stored in a predetermined storage place in the building site. For example, building materials dropped from a truck are placed in a storage place outside a house, covered with a vinyl sheet or the like, and stored so as to be protected from rainwater. Also, if the roofing work is completely completed, it is possible to survive the rain inside the house, so these building materials are stored indoors.

[0004]

However, the conventional method of transporting building materials has the following disadvantages. First, it was necessary to load various building materials produced on each production line of a production factory on a pallet, and load each pallet on a truck. Similarly, at a construction site, it was necessary to unload each transported pallet from a truck and transport each building material to a storage location. These operations are complicated, require a great deal of labor from the operator, and put a heavy burden on the operator. In addition, the loading and unloading operations take a long time, which greatly hinders smooth construction work.

[0005] Further, as described above, when a building material is placed indoors, the building material hinders the building work after that. For example, when performing floor finishing work, part of the floor finishing work is performed while the building material is temporarily moved to one corner of the room, and then the building material is moved to another corner of the room to finish the floor of the other part. Work such as performing construction is required. In other words, building materials placed indoors significantly impair building workability.

In particular, since the interior work is performed at the final stage of the construction work, the interior material is placed indoors until the final stage of the construction work. If the interior material is soiled, its commercial value is lost.
For this reason, when moving the interior material inside the room, it is necessary to pay close attention to prevent the interior material from being soiled, which also places a heavy burden on the operator.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to simplify the work of transporting building materials and to prevent the building materials from interfering with the building work. Moreover, it is intended to ensure that building materials can be protected from rainwater.

[0008]

Means for Solving the Problems-Summary of the Invention- In order to achieve the above object, the present invention provides a method of transporting building materials from a production factory to a building site, in which various building materials are stored in one transport tent. They are brought in and transported together with the tent to the building site.

-Solution Means- Specifically, the method of transporting building materials according to the present invention is as follows. First, in a building material production factory, only the building materials required at the building site of the transport destination are placed in a transport tent. Bring in.
Thereafter, the transport tent is loaded on a transport means and transported to a building site of a house. Further, after this transportation, the transportation tent is lowered from the transportation means to the ground at the building site.

A second solution relates to a tent for transporting building materials used in the above-mentioned transportation method. That is, a building material storage tent having a basket-shaped tent frame formed by combining a plurality of pole materials and a tent curtain covering the tent frame from above is employed. The tent frame of the building material storage tent is provided with a hanging portion capable of hanging the tent frame and the tent curtain integrally. And the building material storage tent,
The suspension unit suspends the vehicle and puts it on a transportation means.

According to these specific items, when building materials are transported from a production factory to a construction site, first, at the production factory, only the building materials required at the destination construction site are carried into the transport tent. . The tent is put on a transportation means such as a truck and transported to a residential building site. At the construction site, the tent is lowered from the vehicle to the ground. Heretofore, it has been necessary to load and unload pallets on which various building materials are placed on a transportation means. According to the present invention, since various building materials can be loaded and unloaded at once, the work of loading and unloading the building materials is simplified. Further, after the tent is dropped down on the building site, the worker takes out building materials from the tent as needed and performs building work. In other words, there is no need to store building materials in the house under construction, and the building materials do not interfere with the construction. For this reason, the workability inside the house is good. Also, at night or the like, building materials are protected from rainwater and the like by tents.

According to a third aspect, in the second aspect, a hanging frame is provided at a bottom of the tent frame. In addition, as the suspension portion, a rope locking member that is provided on the suspension frame and that locks a suspension rope when the transport frame is put on or taken off from the transport unit is employed.

According to this specific matter, when the tent is put on the transportation means and unloaded from the transportation means, the entire tent is suspended by the ropes locked by the rope locking members. In particular, if the tent is suspended using a crane or the like, the labor of the operator can be greatly reduced.

According to a fourth aspect of the present invention, in the above second aspect, the tent frame includes a plurality of columns and a handrail bridged between the columns. The above-mentioned strut is provided with a U-shaped locking member which forms an insertion space with the outer surface of the strut, and a handrail is provided with a wedge member which can be inserted into the insertion space from above in the handrail. By inserting this wedge member into the insertion space, a handrail is spanned between the columns.

According to this specific matter, it is not necessary to use fastening means such as bolts as a connecting structure between the column and the handrail. For this reason, the connecting work between the support and the handrail can be performed easily and in a short time. Also, when the tent frame is disassembled after the construction of the house, it is only necessary to remove the wedge member from the insertion space, so that the disassembly operation can be performed easily and in a short time.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which a building material A is stored in a building material transport tent 1 (hereinafter, simply referred to as a tent) according to the present embodiment. As shown in FIG. 1, the tent 1 has a configuration in which a tent curtain 3 covers the outside of a tent frame 2.

-Description of Tent Frame 2- First, the tent frame 2 will be described. 2 to 4
Indicates the entire tent frame 2. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is a front view. The tent frame 2 has a length of 4.5 m, a width of 1.5 m, and a height of 2.3 m, for example. The length of the tent frame 2 is set substantially equal to or slightly longer than the length of the building material A housed in the tent 1.

The tent frame 2 has eight supporting columns 41 and 42 made of pole material on the upper surface of a hanging frame 21 constituting the bottom of the tent 1. As shown in FIG. 5, the hanging frame 21 is made of H-shaped steel and has a pair of first frames 21 </ b> A, 2 </ b> A extending in the longitudinal direction of the tent 1.
1A and the second frames 21B, 21B having a rectangular cross section by connecting the ends of the first frames 21A, 21A to each other.
And At two places on the upper surface of each of the first frames 21A, 21A, flange portions 22, 22 which protrude upward as rope anchors are protruded. These flanges 2
The projecting positions 2 and 22 are positions on the center side in the longitudinal direction of the tent having a predetermined dimension from both end positions of the first frame 21A. The flange portion 22 has a circular opening 22a penetrating in the longitudinal direction of the tent. This opening 22a
When the tent 1 is suspended, a rope (not shown) or a metal fitting attached to the rope is locked.

Four of the columns 41 and 42 are corner columns 41 located at the four corners of the tent frame 2. The other support is a center support 42. The center supports 42 are arranged at equal intervals between the pair of corner supports 41, 41 facing each other in the longitudinal direction of the tent frame 2.
Books are arranged one by one. The lower ends of the columns 41, 42 are fastened on the first frame 21A of the hanging frame 21.

7 (a) and 7 (b)
As shown in the figure, first and second two types of corner posts 41 are provided.
A, 41B. These corner supports 41A, 41B
Are provided with handrail locks 51 and 52 at a plurality of positions in the vertical direction. As shown in FIG. 7, the handrail locking members 51 and 52 are formed of U-shaped brackets in plan view, and are provided on the outer peripheral surfaces of the corner posts 41A and 41B in one direction.
The locking tool 51 includes a locking tool 51 and a second locking tool 52 provided on an outer peripheral surface in a direction orthogonal to a surface on which the first locking tool 51 is provided. These locking tools 51 and 52 are
1A and 41B are provided at three positions in the vertical direction (see FIGS. 3 and 4). Thereby, the corner supports 41A, 4
1B and an insertion space B between the outer surface of
Are formed. The second locking tool 52 is located below the first locking tool 51. As shown in FIG.
In the first corner support 41A, the second locking tool 52 is
The first locking tool 51 is provided at a position twisted 90 ° clockwise in a plan view with respect to the arrangement position of the first locking tool 51. On the other hand, FIG.
As shown in (b), in the second corner support 41 </ b> B, the second locking member 52 is twisted by 90 ° in the counterclockwise direction in plan view with respect to the disposition position of the first locking member 51. Provided at the specified position.

As shown in FIG. 8, a similar first locking tool 51 and a second locking tool 52 are provided on the center support column 42 as well. In addition, the first support 5 is attached to the center support 42.
1 is provided on the outer peripheral surface opposite to the surface on which
A locking tool 51 is provided.

The arrangement of the pillars 41A, 41B, 42 is such that the first locking members 51, 51, the second locking member 5
2 and 52 are opposed to each other. That is, the first corner support 41A and the second corner support 41B are arranged so as to face each other in the longitudinal direction and the width direction of the tent 1. In addition, the center support 42 is arranged so that the second locking tool 52 faces the inside of the tent 1.

A handrail 7 is provided between the columns 41A, 41B and 42. As shown in FIG. 9, the handrail 7 is formed of a pipe material having a length substantially corresponding to the interval between the columns 41 and 42. Wedge members 71, 71 extending downward are provided at both ends of the handrail 7. The wedge member 71 is formed in a wedge shape that tapers downward, and can be inserted into the insertion space B of the locking members 51 and 52 provided on the columns 41 and 42. For this reason, the wedge members 71, 71 of the handrail 7 are inserted into the insertion spaces B of the locking members 51, 52 of the columns 41, 42, so that
The handrail 7 is stretched between the columns 41 and 42 to connect the columns 41 and 42 to each other. still,
In FIG. 9, each of the first corner support 41 and the first center support 42 is shown.
The wedge members 71, 71 are inserted into the locking members 51, 51,
The insertion operation when the handrail 7 is stretched between the columns 41 and 42 is shown.

FIG. 10 is a plan view showing a state in which the handrails 7, 7 are locked at a corner support 41 (the first support 41A shown in the figure), and FIG.
It is a top view which shows the locking state of the handrails 7, 7, 7 in FIG. In this way, the handrails 7, 7,... Are hung between the columns 41A, 41B, 42, and the columns 41A, 41B,.
The space surrounded by 42 and the handrail 7 is configured to be a space inside the tent.

As shown in FIG. 3, the position of the handrail 7 is set at a column 41 facing the longitudinal direction of the tent 1.
A, 41B, 42, three places in the vertical direction (total 18
As shown in FIG. 4, there are three places in the vertical direction between the columns 41A, 41B, and 42 facing each other in the width direction of the tent 1 (a total of 12 places). The handrail 7 spanned between the struts 41A, 41B and 42 facing each other in the width direction of the tent 1 is a portion where the building material A stored in the tent 1 is placed. For this reason, an elastic material 72 such as a sponge is wound around the handrail 7 in this portion, thereby protecting the building material A.

Each column 41 facing in the width direction of the tent 1
Between A, 41B, and 42, arch members 81, 82 each formed by bending a pipe material in a semicircular arc are bridged. These arch materials 81 and 82 have pillars 41A and 41 at both lower ends.
B and 42 are formed to have a smaller diameter than the inner diameter, and both lower end portions are inserted into upper end portions of the columns 41A, 41B and 42 so as to span between the pair of columns 41A, 41B and 42. In addition, each arch material 81, 82 is a reinforcing material 88 that connects positions slightly lower from the upper end position.
(See FIG. 4).

The arch members 81 and 82 are provided with end arch members 8 which are bridged between the corner posts 41A and 41B.
1 and a center arch material 82 spanned between the center posts 42,42.

As shown in FIG. 12, the end arch material 81
Are provided with locking pieces 83 projecting horizontally toward the inside of the tent at three positions near the upper end. A through hole 84 penetrating in the vertical direction is formed at the center of the locking piece 83.
Are formed. On the other hand, at the three positions near the upper end portion of the center arch material 82, the same locking pieces 83, 83 that protrude in the horizontal direction toward both outer sides of the tent are provided. A through-hole 84 is formed at the center of each of the locking pieces 83, 83 so as to penetrate in the vertical direction.

The tent frame 2 is provided with a connecting bar 85 for connecting the arch members 81 and 82 to each other. As shown in FIG. 12, the connecting bar 85 is formed by processing both ends of a pipe material having a length substantially equal to the interval between the arch materials 81 and 82 into a flat shape. A pin 87 having a diameter slightly smaller than the diameter of the through hole 84 protrudes from the lower surface. Each of the pins 87 is inserted into the through hole 84 of the locking piece 83 from above, so that the arch members 81 and 82 are connected to each other by the connecting bar 85.

As described above, the suspension frame 2
1, each support 41, 42, handrail 7, arch material 81, 8
2. The basket-shaped tent frame 2 is formed by integrally combining the connecting bars 85.

In particular, the handrail 7 uses members constituting a scaffold at a construction site. —Description of Tent Curtain 3— Next, the tent curtain 3 will be described. This tent curtain 3
A plurality of fireproof cloths are sewn together. The shape of the tent curtain 3 is designed to conform to the outer shape of the tent frame 2 as shown in FIG. The tent curtain 3 is provided with fasteners 31 extending in the vertical direction on both left and right sides of the tent 1 so that the surface extending in the width direction of the tent 1 can be opened. That is, in a state where the fastener 31 is opened, the tent curtain 32 along the surface extending in the width direction of the tent 1 functions as a door of the tent 1. FIG. 1 shows a state in which the fastener 31 is opened and the tent curtain 32 is rolled up (the door is opened). Further, the tent curtain 3 is provided with a hook (not shown) for holding the tent curtain 32 in order to maintain the rolled-up state. Conventionally known hooks are used as the hooks.

Description of Transport Operation of Building Material A Next, an operation of transporting the building material A from the production factory to the building site using the tent 1 configured as described above will be described.

First, the operation of assembling the tent 1 will be described. The assembling of the tent 1 is carried out in a building material A production factory. The columns 41A, 41B, and 42 are erected on the upper surface of the frame-shaped hanging frame 21, and the columns 41A, 41B, and 42 are provided.
A, insertion spaces B of the locking tools 51, 52 of 41B, 42
The wedge members 71 of the handrails 7, 7,... Are inserted from above. Thus, each support 4 is made up of the handrails 7, 7,.
1A, 41B and 42 are connected to each other. In addition, each pillar 41
The lower ends of the arch members 81 and 82 are inserted into the upper ends of A, 41B and 42, whereby the arch members 81 and 82 are bridged between the struts 41A, 41B and 42 facing each other in the tent width direction. Further, locking pieces 83 of these arch materials 81 and 82 are provided.
, The pin 87 of the connecting bar 85 is inserted. Thereby, each support | pillar 41A, 41B, 42, the handrail 7, arch material 81,8.
2. The connecting bar 85 is integrally combined to complete the basket-shaped tent frame 2 as shown in FIGS. The work of inserting the wedge member 71 and the like is performed using, for example, a hammer.

After the completion of the tent frame 2, the tent curtain 3 covers the entire tent frame 2. As a result, the internal space of the tent 1 is shielded from the outside by the tent curtain 3, so that rainwater does not enter the internal space even when it rains. Thus, the tent 1 is completed.

In the tent 1 constructed in this way, only the building material A required at the construction site of the transport destination is carried into the tent 1 internal space. That is, the fastener 31 of the tent 1 is opened to wind up the tent curtain 32 serving as a door, and the wound tent curtain 32 is held by the hook. As a result, the surface of the tent 1 in the width direction is opened. In this state, the building material A is carried into the tent 1. For example, foundation work, roof work,
When the exterior work is completed, building materials such as floor finishing materials and interior materials are carried into the tent 1. As this carrying-in work, it is accommodated in a state where it is placed above a plurality of handrails 7 extending in the width direction (handrails 7 around which the elastic material 72 is wound). The inner space of the tent 1 is divided into upper and lower three layers by a handrail 7 extending in the width direction.
The building material A is carried into each storage space according to the type of the building material A. For example, a material for floor finishing work is transported to the lowermost layer, a material for electrical installation work is transported to the middle layer, and a material for interior work is transported to the uppermost layer. After the carry-in, the fastener 31 of the tent 1 is closed to shut off the internal space of the tent 1 from the outside.

Next, the operation of transporting the tent 1 into which the building material A has been carried in will be described. First, as shown in FIG. 6, the rope R or a metal fitting attached to the rope R is hooked on each flange portion 22 of the hanging frame 21. As shown in FIG. 6, the tent 1 is lifted by the crane C, and the tent 1 is placed on a truck.

The tent 1 is transported by the truck to the construction site, and the tent 1 is lowered on the construction site by the crane C in the same manner as described above.
Thus, the building material A has been transported to the building site.

At the construction site, the worker opens the fastener 31 of the tent 1 and takes out the building material A necessary for the house under construction from the tent 1 to perform construction work.

Further, at night or on a day when construction is not performed, the fastener 31 of the tent 1 is closed to prevent infiltration of rainwater or night dew into the internal space of the tent 1. Thereby, the building material A
Can be reliably protected. In particular, since the interior material such as wallpaper is soiled by rainwater or the like, the commercial value thereof is lost. By storing the interior material in the tent 1, the stain can be surely prevented.

After the construction of the house is completed, the tent 1 is dismantled. In this dismantling operation, first, the tent curtain 3 is removed from the tent frame 2. afterwards,
The pin 87 of the connecting bar 85 is pulled upward from the through hole 84 of the locking piece 83. In addition, each arch material 81, 82 is
A, 41B, and 42 are pulled upward. Furthermore, handrail 7
The wedge member 71 is pulled out from the internal space B of the locking members 51 and 52. These drawing operations are also performed using a hammer. In this manner, the columns 41A, 41B, 42, the handrail 7, the arch members 81, 82, and the connecting bar 85 are separated from each other, and the tent 1 is dismantled.

As described above, according to the tent 1 of the present embodiment, when the building material A is transported from the production factory to the building site, various building materials A are carried into the tent 1, and the tent 1 Can be transported to the building site. Heretofore, it has been necessary to load and unload pallets on which various building materials are placed on a transportation means such as a truck. In particular, at a construction site, it was necessary to carry the unloaded building materials to a predetermined storage location. In this embodiment, since various building materials can be collectively loaded and unloaded on the truck, the work of loading and unloading the building materials is simplified. As a result, the labor of the worker can be reduced, the working time for loading and unloading the building materials can be reduced, and the construction period of the entire building work can be shortened. Further, after the tent 1 is dropped on the building site, the building material A can be placed outdoors of the house under construction while protecting the building material A from rainwater or the like. Conventionally, after the roofing work was completed, the building materials were placed inside the house under construction, so that the building materials hindered the subsequent building work. In this embodiment, both protection of the building material A and ensuring good building workability of the house can be achieved at the same time.

Further, since the tent frame 2 does not use any means such as bolting, the assembling work and the disassembling work are extremely easy, and the assembling work and the dismantling work time can be shortened.

Further, since the members forming the scaffold at the construction site are used as the handrails 7, it is not necessary to separately manufacture the handrails 7 as members dedicated to the tent, and the cost of the tent 1 can be reduced. Can be achieved. In addition, each pillar 4
If the members forming the scaffold are used for other members such as 1, 42, the cost can be further reduced.

In this embodiment, the tent 1 is lifted and loaded on a truck. The present invention is not limited to this, and the tent 1 may be placed on a cart and transported to the building site by towing.

In this embodiment, the columns 41A, 41
B, 42, handrail 7, arch materials 81, 82, connecting bar 85
And the tent frame 2 is constructed by assembling them with each other by an insertion operation. The present invention is not limited to this, and these may be assembled by fastening means such as bolting.

[0046]

As described above, according to the present invention, the following effects are exhibited.

According to the first and second aspects of the invention, when building materials are transported from a production factory to a building site, various building materials are carried into one transport tent, and the entire tent is transported to the building site. I am trying to do it. Heretofore, it has been necessary to load and unload pallets on which various building materials are placed on a transportation means such as a truck. In particular, at a construction site, it was necessary to carry the unloaded building materials to a predetermined storage location. According to the present invention, since various building materials can be collectively loaded and unloaded, the work of loading and unloading the building materials is simplified. As a result, the labor of the worker can be reduced, the working time for loading and unloading the building materials can be reduced, and the construction period of the entire building work can be shortened. Also, after the tent has been lowered to the building site, the building material can be placed outside the house under construction while protecting the building materials from rainwater and the like. Conventionally, after the roofing work was completed, the building materials were placed inside the house under construction, so that the building materials hindered the subsequent building work. ADVANTAGE OF THE INVENTION According to this invention, protection of building materials and ensuring of favorable construction workability of a house can be compatible.

According to the third aspect of the invention, when the tent is put on the transportation means and when the tent is lowered from the transportation means, the entire tent can be suspended by the ropes locked by the rope locking members. . Thereby, the work of transporting the tent can be embodied, and the practicality of the present invention can be improved. In particular, if the tent is suspended using a crane or the like, the labor of the operator can be greatly reduced.

According to the fourth aspect of the present invention, a wedge member provided on the handrail is inserted into a space for inserting a locking member provided on the support post as a connecting structure between the support and the handrail constituting the tent frame. I have. For this reason, it is not necessary to use fastening means such as bolts as a connecting structure between the column and the handrail. As a result, the connecting work between the support and the handrail can be performed easily and in a short time. Also, after building the house,
When disassembling the tent frame, this disassembling operation can be performed easily and in a short time. This also enables efficient construction work and shortens the construction period.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tent for transporting building materials according to an embodiment.

FIG. 2 is a plan view of a tent frame.

FIG. 3 is a side view of the tent frame.

FIG. 4 is a front view of a tent frame.

FIG. 5 is a perspective view of a hanging frame.

FIG. 6 is a diagram showing a suspended state of a tent.

7A is a perspective view of a first corner support, and FIG. 7B is a perspective view of a second corner support.

FIG. 8 is a perspective view of a center support.

FIG. 9 is a diagram for explaining the work of locking a handrail to a support.

FIG. 10 is a plan view showing a state in which a handrail is locked at a corner support.

FIG. 11 is a plan view showing a state in which a handrail is locked on a center support.

FIG. 12 is a view for explaining the locking operation of the connecting bar to the arch material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tent for transporting building materials 2 Tent frame 21 Suspended frame 22 Flange portion (rope locking device) 3 Tent curtain 41 Corner support 42 Center support 51 First locking device 52 Second locking device 7 Handrail 71 Wedge member B Insertion space

Claims (4)

[Claims] Claims 1. At a building material production plant, after only building materials required at a construction site of a transport destination are carried into a tent for transportation, the tent for transportation is carried on a transportation means and transported to a building site of a house. After this transportation, the transportation tent is lowered from the transportation means to the ground at the building site. 2. A tent frame formed by combining a plurality of pole materials in a basket shape, and a tent curtain covering the tent frame from above, the tent frame including a tent frame and a tent curtain. A tent for transporting building materials, comprising a hanging portion that can be hung as a unit, and being hung by the hanging portion and put on a transportation means. 3. The tent for transporting building materials according to claim 2, wherein a suspension frame is provided at a bottom portion of the tent frame, and the suspension portion is provided on the suspension frame and mounted on a transportation means. A tent for transporting building materials, characterized in that the tent is a rope-locking device for locking a hanging rope when the rope is suspended from a transportation means. 4. The tent for transporting building materials according to claim 2, wherein the tent frame includes a plurality of pillars and a handrail bridged between the pillars. While a U-shaped locking member that forms an insertion space with the outer surface of the handrail is provided, the handrail is provided with a wedge member that can be inserted from above into the insertion space, By inserting the member into the insertion space,
A tent for transporting building materials, characterized in that handrails are stretched between the columns.