CN107336346A - A kind of beam making bench - Google Patents

A kind of beam making bench Download PDF

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Publication number
CN107336346A
CN107336346A CN201710602312.3A CN201710602312A CN107336346A CN 107336346 A CN107336346 A CN 107336346A CN 201710602312 A CN201710602312 A CN 201710602312A CN 107336346 A CN107336346 A CN 107336346A
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CN
China
Prior art keywords
steel
making bench
steel plate
channel
beam making
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710602312.3A
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Chinese (zh)
Other versions
CN107336346B (en
Inventor
杨涛
桂海波
吴永文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway 11th Bureau Group Co Ltd
Third Engineering Co Ltd of China Railway 11th Bureau Group Co Ltd
Original Assignee
China Railway 11th Bureau Group Co Ltd
Third Engineering Co Ltd of China Railway 11th Bureau Group Co Ltd
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Application filed by China Railway 11th Bureau Group Co Ltd, Third Engineering Co Ltd of China Railway 11th Bureau Group Co Ltd filed Critical China Railway 11th Bureau Group Co Ltd
Priority to CN201710602312.3A priority Critical patent/CN107336346B/en
Publication of CN107336346A publication Critical patent/CN107336346A/en
Application granted granted Critical
Publication of CN107336346B publication Critical patent/CN107336346B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B17/00Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping

Abstract

A kind of beam making bench of disclosure, including:The pedestal basis that armored concrete pours, the steel plate component being embedded in the pedestal basis, the I-steel being fixedly connected with the steel plate component;The I-steel upper surface is fixedly installed channel-section steel, and the channel-section steel upper surface is fixedly installed bed die steel plate.The beam making bench that the application provides can reduce the dismounting of later stage concrete works, reduce the waste in soil and the destruction to environment, shorten the T-shaped beam prefabricated cycle, accelerating construction progress, improve production efficiency.

Description

A kind of beam making bench
Technical field
The application is related to railway traffic technical field, more specifically, more particularly to a kind of beam making bench.
Background technology
With developing rapidly for railway traffic technology, in China's heavy haul railway, science of bridge building account for very big ratio.Its In, prefabricated T-shaped beam piece is an important part in science of bridge building, and in China, the production of prefabricated T-shaped beam piece is needed by special Beam making field centralized production complete, beam making bench is the important tooling device of beam making field, is served as in the production of prefabricated T-shaped beam piece Indispensable part.
At present, part western countries and the country are mostly still using all steel reinforced concrete formula pedestal, and this pedestal is by end Basis, end longeron, middle part basis and waist longeron composition.In construction, foundation excavation and processing are carried out first, in banded end Basis and middle part reinforcement foundation, and longeron reinforcing bar, formwork erection construction casting concrete etc..Using this Liang Tai processed of the prior art Seat carries out the making of T-shaped beam, can influence construction speed, and the T-shaped beam prefabricated cycle is grown, and production efficiency is very low.
A kind of beam making bench how is designed, accelerating construction progress can be advantageous to, shortens the T-shaped beam prefabricated cycle, improves T The production efficiency of type beam, have become those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
In order to solve the above technical problems, the application provides a kind of beam making bench, can be advantageous to shorten T-shaped beam prefabricated week Phase, improve the production efficiency of T-shaped beam.
The technical scheme that the application provides is as follows:
A kind of beam making bench, including:The pedestal basis that armored concrete pours, is embedded in the pedestal basis Steel plate component, the I-steel being fixedly connected with the steel plate component;The I-steel upper surface is fixedly installed channel-section steel, the groove Steel upper surface is fixedly installed bed die steel plate.
Further, in a kind of preferable mode of the present invention, the beam making bench also includes Beam shifter, the shifting beam Device is used to move prefabricated T-shaped beam.
Further, in a kind of preferable mode of the present invention, the Beam shifter includes:It can be slided on the way of moving the beam Mobility framework, the mobility framework is welded by longeron component, transverse beam assembly, channel-section steel, the welding of transverse beam assembly both ends termination There is the installation steel plate vertical with beam body length direction, slip wheel shaft is installed on the installation steel plate.
Further, the transverse beam assembly is provided with height regulation threaded rod, and the height regulation threaded rod bottom is set There is the leveling metal mat for maintaining mobility framework to be in horizontality.
Further, the Beam shifter is specially two, is respectively arranged on beam making bench both sides termination to beam processed Pedestal center position length is the position at 3.5 meters.
Further, in a kind of preferable mode of the present invention, the I-steel is provided with steam curing pipe hole, described Steam curing pipe is installed on steam curing pipe hole.
Further, in a kind of preferable mode of the present invention, between length direction of the I-steel along prefabricated T-shaped beam is equidistant Every arrangement.
Further, the equidistant arranged for interval of length direction of the I-steel along prefabricated T-shaped beam, the spacing are preferably 0.8m。
Further, channel-section steel is vertical with I-steel length direction, and is equidistantly spaced along the length direction of prefabricated T-shaped beam Arrangement.
Further, in a kind of preferable mode of the present invention, it is fixedly installed at the top of I-steel for adjusting antiarch The adjustment steel plate of precision.
Further, the adjustment steel plate of the precision for adjusting antiarch is fixedly installed at the top of I-steel specifically, work The adjustment steel plate of the precision for adjusting antiarch is welded with the top of word steel.
Further, in a kind of preferable mode of the present invention, steel plate is strengthened in the both ends of I-steel and middle fixed setting.
Further, the both ends and middle part strengthened steel plate and be soldered to I-steel.
A kind of beam making bench provided by the invention, compared with prior art, it includes the platform that armored concrete pours Seat is basic, and pre-embedded steel slab component in pedestal basis, steel plate component is fixedly connected with I-steel, and I-steel upper surface is fixedly installed Channel-section steel, channel-section steel upper surface are fixedly installed bed die steel plate.The dismounting of later stage concrete works can be so reduced, reduces soil Waste and the destruction to environment, the T-shaped beam prefabricated cycle is shortened, accelerating construction progress, improves production efficiency.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of application, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of beam making bench provided in an embodiment of the present invention;
Fig. 2 is the side view of beam making bench provided in an embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understands the technical scheme in the application, it is real below in conjunction with the application Technical scheme in the embodiment of the present application is clearly and completely described the accompanying drawing applied in example, it is clear that described embodiment The only part of the embodiment of the application, rather than whole embodiments.It is common based on the embodiment in the application, this area The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model of the application protection Enclose.
Please be as shown in figure 1, the embodiment of the present application provides a kind of beam making bench, including the pedestal that armored concrete pours Basis 1, the steel plate component 2 being embedded in pedestal basis 1, the I-steel 3 being fixedly connected with steel plate component 2;The upper surface of I-steel 3 Channel-section steel 4 is fixedly installed, the upper surface of channel-section steel 4 is fixedly installed bed die steel plate 5.
At present, part western countries and the country are mostly still using all steel reinforced concrete mode pedestal, by end basis, end Portion's longeron, middle part basis and waist longeron composition.In construction, carry out foundation excavation and processing first, on banded end basis and Middle part reinforcement foundation, and longeron reinforcing bar, formwork erection construction casting concrete etc..This whole concrete structure type is in practice of construction Need to carry out concreting, concrete form removal, concrete curing, manufacturing process is time-consuming, cycle length, and quantities is big.
A kind of steel construction convolution beam making bench provided in an embodiment of the present invention, including the platform that armored concrete pours Seat basis 1, pre-embedded steel slab component 2 in pedestal basis 1, steel plate component 2 is fixedly connected with I-steel 3, and the upper surface of I-steel 3 is fixed Channel-section steel 4 is provided with, the upper surface of channel-section steel 4 is fixedly installed bed die steel plate 5.The dismounting of later stage concrete works can be so reduced, The waste in soil and the destruction to environment are reduced, the T-shaped beam prefabricated cycle is shortened, accelerating construction progress, improves production efficiency.
It is preliminary in advance first in concrete foundation pre-embedded steel slab component 2 after the basis optimization poured by armored concrete T-shaped beam antiarch is arranged on pre-embedded steel slab, after the completion of adjustment, the bottom of I-steel 3 is welded on pre-embedded steel slab.Measure I-shaped The antiarch value at the top of steel 3, then adjust the precision of antiarch by the way that adjustment steel plate is added and welded at top.I-steel 3 is grown Spend length direction of the direction perpendicular to prefabricated T-shaped beam body, and I-steel 3 is multiple, and length direction along prefabricated T-shaped beam etc. Spacing arranged for interval, arrangement spacing is preferably 0.8m.Channel-section steel 4 is welded above I-steel 3, multiple channel-section steels 4 hang down along beam length direction Directly in the length direction arranged for interval of I-steel 3, the upper surface of channel-section steel 4, which is welded and fixed, sets bed die steel plate 5.
Start reinforced concrete foundation to pour, in concrete foundation along prefabricated T-shaped beam length direction pre-embedded steel slab component 2, Fastener inserts remain parallel to each other around, and steel plate component 2 should control default camber accordingly pre-buried when, in base I-steel 3 and pre-embedded steel slab are welded after the completion of plinth hardening.
It should be noted that " antiarch " that the application is related to refers to antiarch bridge after building up, due to lotuses such as automobile, pedestrians The effect of load, a downward displacement can be produced, amount of deflection is also in this displacement, when this will cause the actual elevation of bridge floor with design Elevation be not inconsistent.
The degree not being consistent for elevation when eliminating or reduce the actual elevation of bridge floor with designing is, it is necessary to set one in advance Arch, that is, allow bridge to do high certain height upwards during construction, make the bridge elevation built up higher than design altitude one On numerical value, such pedestrian and vehicle after bridge, bridge floor height can and design altitude are basically identical.
" camber " being related in the application refers to the slight convexity of T-shaped beam, arch or curvature, it can be understood as superstructure and Each deformation values sum of support, the camber that should as set.Elasticity and inelastic deformation will be produced after support stand under load, on bridge Portion's structure can produce amount of deflection under Gravitative Loads, and in order to ensure accuracy of gauge after bridge completion, in construction, support must be set Put a number of camber.
Welding before, it is necessary to by design requirement position, the setting-out on steel plate component 2, it is desirable to be accurate to the position of each I-steel 3 Put, and draw tag line;
During welding, then progressively to be welded since the middle part of pre-embedded steel slab to both ends, first carry out spot welding, enter again Row full weld.
After I-steel 3 is fully completed with pre-embedded steel slab welding, according to the top surface designed elevation of each I-steel 3, again to work The top surface of word steel 3 is checked, to ensure that pedestal reserves the accuracy of antiarch value.
The length direction of I-steel 3 perpendicular to prefabricated T-shaped beam body length direction, I-steel 3 have it is multiple, and along prefabricated T The length direction arranged for interval of type beam body, steel construction beam making bench are used as main support load force carrier using I-steel 3.
Hereinafter, illustrated by taking 32mT type beams as an example, each I-steel 3 is processed as 84cm length, high 32cm, and I-steel 3 is total to Sum 42, in addition, in order to ensure that I-steel 3 supports the safe and reliable row of stress, add at the both ends of I-steel 3 and middle set Strong steel plate 6 welds, and the face of reinforcement steel plate 6 is vertical with the length direction of I-steel 3, and each I-steel 3 is preferably provided with six pieces altogether Strengthen steel plate 6.Strengthen steel plate 6 to be centrosymmetrically arranged with I-steel 3, increase the support force of I-steel 3, ensure steel construction pedestal not Deformation.
Channel-section steel 4 is along the length direction arranged for interval of I-steel 3, after the review of the top surface absolute altitude of I-steel 3 is errorless, then channel-section steel 4 is welded The top surface of I-steel 3 is connected to, as the top surface absolute altitude of I-steel 3 has error, can be adjusted by the way that adjustment steel plate is added and welded at top The precision of antiarch.
Preferably, channel-section steel 4 need to exceed I-steel 30.08m, when welding channel-section steel 4, it should from one end to other end gradually by Step welding, and snap the line aligns, and ensures that pedestal is linear, makes 4 times side wings of channel-section steel only close to the top surface of I-steel 3, and channel-section steel 4 welds on inspection After wiring row and absolute altitude are errorless, bed die steel plate is welded on to the upper surface of channel-section steel 4, repetition measurement counterdie steel plate top again after the completion of welding The absolute altitude in face.
Beam making bench is being optimized for the processing of roadbed terminal spine using pedestal basis, enhances subgrade strength.So that the system of T-shaped beam The time made from constructing to coming into operation is short, it is contemplated that the about time can come into operation, in addition, the embodiment of the present invention provides The beam making bench later stage can also repeat recycle, largely saved manpower and materials, reduce production this.Reduce The dismounting link of later stage concrete works, reduce the waste in soil and the destruction to environment.Significantly reduce T-shaped beam prefabricated In the cycle, accelerating construction progress, improve production efficiency.
In the embodiment of the present invention, beam making bench also includes Beam shifter, and Beam shifter is used to move prefabricated T-shaped beam.
In the embodiment of the present invention, Beam shifter includes:The mobility framework that can be slided on the way of moving the beam, mobility framework is by indulging Beam assembly, transverse beam assembly, channel-section steel 4 are welded, and transverse beam assembly both ends termination is welded with the installation vertical with beam body length direction Steel plate 8, install to be provided with steel plate 8 and slide wheel shaft 81.
Steel construction beam making bench is combined with fixed traverse beam slideway, in beam making bench termination along 3.5 meters of beam body length direction Position set mobility framework, ensure pedestal basis is mutually independent of each other with mobility framework, accelerate shifting beam the effect of.
The way of moving the beam is installed, the way of moving the beam is preferably to use 60kg/m rail, the steam curing pipeline table at mobility framework Face pours about 10cm thickness concrete.
In the embodiment of the present invention, transverse beam assembly is provided with height regulation threaded rod 7, and height adjusts the bottom of threaded rod 7 and is provided with For maintaining mobility framework to be in the leveling metal mat 71 of horizontality.
In the present embodiment, specifically, mobility framework by longeron channel-section steel 4 and the components welding of crossbeam channel-section steel 4 into framework knot Structure, totally four pairs of girder construction components in length and breadth, at steel plate thick the front and rear sides 2cm perpendicular to beam body length direction and crossbeam firmware end Head welding, weld seam is full, meets force request.Installation among steel plates 6 is installed at two pieces after the completion of welding and slides wheel shafts 81, by Screwed hole, setting height(from bottom) regulation threaded rod 7 are made on nearly transverse beam assembly on about 1/3rd position.Height is adjusted into threaded rod 7 To when arriving certain altitude, height adjusts the bottom of threaded rod 7 and sets leveling metal mat 71 for lifting, carriage frame is in horizontal State.In length and breadth beam assembly, be welded to connect using channel-section steel 4 at the top of the steel plate of both ends integral, lay steel bed die and in steel at the top of channel-section steel 4 Bed die lower bottom part welded limiting steel, prevents bed die displacement.It is T-shaped it is beam prefabricated during, pass through height adjust threaded rod 7 liter Drop, end template is jacked up into certain design antiarch value height, and push rod is supported in into ground to make its stress.
It is T-shaped it is beam prefabricated after the completion of reach move beam condition when, first mobile bed die is pushed into away, beam transport vehicle will be moved and placed In on rail, T-shaped beam is moved in depositing on beam pedestal by moving beam transport vehicle.
Specifically, Beam shifter is specially two, is respectively arranged on beam making bench both sides termination to beam making bench center position Length is the position at 3.5 meters.
In the embodiment of the present invention, I-steel 3 is provided with steam curing pipe hole, and steam is provided with steam curing pipe hole Conserve pipe 9.
In embodiments of the present invention, after pedestal installation, each I-steel 3 is offset into 60cm, work to the left along its length The bottom of word steel 3 up offsets 60cm, and jewel hole reserves steam curing pipe hole.After the completion of steam curing pipe hole, installation steam is supported Pillar 9, steam curing pipe 9 are preferably the steel pipe using 50mm.
In the embodiment of the present invention, the equidistant arranged for interval of length direction of the I-steel 3 along prefabricated T-shaped beam.
Specifically, the equidistant arranged for interval of length direction of the I-steel 3 along prefabricated T-shaped beam, the spacing are preferably 0.8m.
More specifically, channel-section steel 4 is vertical with the length direction of I-steel 3, and equidistantly it is spaced along the length direction of prefabricated T-shaped beam Arrangement.
In the embodiment of the present invention, the top of I-steel 3 is fixedly installed the adjustment steel plate of the precision for adjusting antiarch.
Specifically, steel plate 6 is strengthened in the both ends of I-steel 3 and middle fixed setting.
More specifically, strengthen both ends and middle part that steel plate 6 is soldered to I-steel 3.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention. A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one The most wide scope caused.

Claims (10)

  1. A kind of 1. beam making bench, it is characterised in that including:The pedestal basis that armored concrete pours, is embedded in described Steel plate component in seat basis, the I-steel being fixedly connected with the steel plate component;The I-steel upper surface is fixedly installed Channel-section steel, the channel-section steel upper surface are fixedly installed bed die steel plate.
  2. 2. beam making bench according to claim 1, it is characterised in that the beam making bench also includes Beam shifter, described Beam shifter is used to move prefabricated T-shaped beam.
  3. 3. beam making bench according to claim 2, it is characterised in that the Beam shifter includes:Can be on the way of moving the beam The mobility framework of slip, the mobility framework are welded by longeron component, transverse beam assembly, channel-section steel, transverse beam assembly both ends termination The installation steel plate vertical with beam body length direction is welded with, slip wheel shaft is installed on the installation steel plate.
  4. 4. beam making bench according to claim 3, it is characterised in that the transverse beam assembly is provided with height regulation screw thread Bar, the height regulation threaded rod bottom are provided with the leveling metal mat for being used for maintaining mobility framework to be in horizontality.
  5. 5. beam making bench according to claim 4, it is characterised in that the Beam shifter is specially two, is respectively arranged on Beam making bench both sides termination to beam making bench center position length be 3.5 meters at position.
  6. 6. beam making bench according to claim 1, it is characterised in that the I-steel upper surface is provided with anti-for adjusting The adjustment steel plate of the precision of arch.
  7. 7. beam making bench according to claim 1, it is characterised in that the I-steel is provided with steam curing pipe hole, Steam curing pipe is installed on the steam curing pipe hole.
  8. 8. beam making bench according to claim 1, it is characterised in that length direction of the I-steel along prefabricated T-shaped beam Equidistant arranged for interval.
  9. 9. beam making bench according to claim 8, it is characterised in that the channel-section steel is vertical with I-steel length direction, and Along the equidistant arranged for interval of the length direction of prefabricated T-shaped beam.
  10. 10. beam making bench according to claim 1, it is characterised in that the both ends of the I-steel and middle fixed setting There is reinforcement steel plate.
CN201710602312.3A 2017-07-21 2017-07-21 Beam making pedestal Active CN107336346B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710602312.3A CN107336346B (en) 2017-07-21 2017-07-21 Beam making pedestal

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Application Number Priority Date Filing Date Title
CN201710602312.3A CN107336346B (en) 2017-07-21 2017-07-21 Beam making pedestal

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CN107336346A true CN107336346A (en) 2017-11-10
CN107336346B CN107336346B (en) 2023-09-12

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108818890A (en) * 2018-06-29 2018-11-16 中交二公局东萌工程有限公司 A kind of I-steel T girder prefabricated pedestal and preparation method thereof
CN109571720A (en) * 2019-01-15 2019-04-05 中铁宝桥(扬州)有限公司 A kind of high-accuracy multifunctional concrete slab prefabricated mould and its working method
CN110421685A (en) * 2019-07-25 2019-11-08 德睿盛兴(大连)装配式建筑科技有限公司 A kind of concrete prefabricated element entirety bed die
CN111469253A (en) * 2020-04-09 2020-07-31 中铁十四局集团第一工程发展有限公司 Assembled multifunctional steel structure box girder pedestal
CN113199617A (en) * 2021-05-13 2021-08-03 中建交通建设集团有限公司 A assembled conversion frock for different end width prefabricated T roof beams

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CN202985773U (en) * 2012-12-13 2013-06-12 广汉金达隧道机械有限公司 Counter-vault adjusting device of bridge beam prefabricating forming external mould base plate
CN204054323U (en) * 2014-06-28 2014-12-31 中铁十局集团第三建设有限公司 Steel construction assembled beam making bench
CN204097880U (en) * 2014-09-10 2015-01-14 中铁四局集团第五工程有限公司 A kind of self-propelled transverse-moving trolley
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CN105171911A (en) * 2015-03-27 2015-12-23 中铁四局集团第五工程有限公司 Bottom mold trolley
CN204982676U (en) * 2015-09-08 2016-01-20 贵州省公路工程集团有限公司 Conveyer is assembled on steel purlin girder segment section ground
CN105603878A (en) * 2015-12-23 2016-05-25 中铁二十四局集团安徽工程有限公司 High-altitude rapid transverse moving method for concrete box beam

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JPH1113020A (en) * 1997-06-20 1999-01-19 Oriental Constr Co Ltd Carrying-in method of supporting device for abutment
CN202705906U (en) * 2012-06-08 2013-01-30 中铁十九局集团第六工程有限公司 Sliding way carrier roller device for longitudinal beam erecting
CN102864744A (en) * 2012-08-31 2013-01-09 中交第二航务工程局有限公司 Precast concrete construction element transporting system and method
CN202985773U (en) * 2012-12-13 2013-06-12 广汉金达隧道机械有限公司 Counter-vault adjusting device of bridge beam prefabricating forming external mould base plate
CN204054323U (en) * 2014-06-28 2014-12-31 中铁十局集团第三建设有限公司 Steel construction assembled beam making bench
CN204097880U (en) * 2014-09-10 2015-01-14 中铁四局集团第五工程有限公司 A kind of self-propelled transverse-moving trolley
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108818890A (en) * 2018-06-29 2018-11-16 中交二公局东萌工程有限公司 A kind of I-steel T girder prefabricated pedestal and preparation method thereof
CN109571720A (en) * 2019-01-15 2019-04-05 中铁宝桥(扬州)有限公司 A kind of high-accuracy multifunctional concrete slab prefabricated mould and its working method
CN109571720B (en) * 2019-01-15 2024-02-02 中铁宝桥(扬州)有限公司 High-precision multifunctional concrete bridge deck prefabricating die and working method thereof
CN110421685A (en) * 2019-07-25 2019-11-08 德睿盛兴(大连)装配式建筑科技有限公司 A kind of concrete prefabricated element entirety bed die
CN110421685B (en) * 2019-07-25 2021-10-19 德睿盛兴(大连)装配式建筑科技有限公司 Whole die block of concrete prefabricated component
CN111469253A (en) * 2020-04-09 2020-07-31 中铁十四局集团第一工程发展有限公司 Assembled multifunctional steel structure box girder pedestal
CN113199617A (en) * 2021-05-13 2021-08-03 中建交通建设集团有限公司 A assembled conversion frock for different end width prefabricated T roof beams

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