GB2526199A - Construction beam - Google Patents

Abstract

The construction beam 10 of uniform cross-section has two parallel vertical walls 21 having multiple holes 28 for receiving spacers 30, wherein the two ends of the spacers each have inner and outer abutment sections for contacting the internal and external faces of the walls. Each spacer assembly may include a spacer member 31 such as a tubular body or sleeve that acts as an inner abutment section, and a restriction assembly such as a nut 37 and bolt 36 or rivet 38, which passes through the apertures in the wall and the spacer member, acting as the outer abutment section. The beam may have perforations 25 in the walls for securing a fastening member 40 along a top wall of the beam. The beam walls may define a space for receiving a connection member 50 that can be fixed to the beam by threaded assemblies 60 and apertures 27,53.

Description

C(NSTRWI'I (N BEAM BACK(IRUJND cF THE I NVEN['I (N

1. Field of the Invention

The present invention re'ates generally to a construction inpleimnt and, nnre particularly, to a construction beam 2. scription of the Related kt In construction operation, concrete is grouted to form solid structure of aconstruction. WiengrouLinginvarious construction sites, bcaim arc popularly uscd to support 3oodcn bars for supporting the nuldboard as a commn construcLion imans. The beaim are able to bear the ei ght or pressure of the concrete.

Mst of the convent i onal heaim are woden heaim and imt al heaim.

The xwoden beam has a poor sLructural strength and cannot be recovered. In case of danuge, the ooden beamcan be only directly discarded ithout possibility of reuse. This is not a good opti on I n imdern t i ims that enphas i zes envi r onnunt al protect i on.

The conventional netal hearnhas a quite sinple cross-sectional structure. Therefore, Lheimtalbeamcanonlybearlinitedpressure.

In case of grealer application force, the beam is often defornud or I at era I y bent. Therefore, the convent i ona net al hearncan hardly bear greater action force.

Mifeover, the grout i ng imi dhoard i s supported by the wooden bars, whi c h are supported by t he beams. T-bwever, nei t her the wooden beams nor the net a beams are desi gned i t h structure for fixing the wooden bars. In case of stronger grouting intensity, the wooden bars often displace fromtheir hone positions due to shock or even drop dowi from the beams. thder such circumsi ance, ihe nul dboard will break apart and the concrete will fall to cause danger. Beside, the convent i onal beam has a fi xed length and I acks any sui t aN e desi gn for connecting the beams into a longer engt h. In the case that the grouting area exceeds the length of Ihe beam imny orkers often randoniy set the beams. As a result, the beams will inLersect each other to asyinretrically support the nDldboard. This w4ll cause uneven supporting force for the respective paris of the imldboard.

Therefore, it has becone a critical issue how to provide a design for fi xi ng the wooden bars and connect i ng the beams wñ t h each other.

S UMvRY 1F THE I NVENTI U'4 It is therefore a pri nary object of the present invention to provide a construction beam hi ch has hi gher force bearing strength and is nure solid and durable.

It is a furiher object of Ihe present invention to provide a construction beam Ven imuniing wooden bars on the beams, the wooden bars can he secured to the irni n bodies by ninans of niul t i p e fasl eni ng ntnber s for laying a m1 dboard on the wooden bars.

It is still a further object of the present invention to provide a const ruct i on beam Two heaim can he axi al I y connect ed with each other by rreans of a connect i on neiTher to form a support beam wi t h longer length in accordance with the grout i ng area.

The construclion beamof the present invention includes: a imi n body, which i s an ci ongat ed body havi ng uni for ni cross-sectiona' shape, the rrain body including two vertical walls, a top wall transversely connected between top edges of the two vertical walls, two bottomwalls inwardhorizonlally extending from bottomcdgcs of thc two vertical walls, and two upri ght walls upward extending frornfree edge of the bolt orn walls by a cerlai n height; and infltipe spacer asseithlies disposed between the two vertical walls of Ihe 1mm body, two ends of each spacer assenbly abutting against the two vertical walls to keep the two vertical walls spaced from each other by a fixed distance.

In the above bean the nultiple spacer assenblies are disposed between the two vertical walls of the nain body to restrict the two vertical walls and keep the two vertical walls spaced fromeach other by a fixed distance. kcordingly, when a force is applied to the vertical waMs, the vertical waHs are prevented frorncontracting or cleforning.

Mfltipe perforations forned through the tw vertical lls of the imin body the above hearr a connection bolt nerrber is passed through the perforations of the tw vertical aHs to connect the imi n body vA th a fastening ntnher for fixing woden bars.

Mcordi ng y, the woden bars are prevented from si ngi ng to provi de a support for the nuldboard and facilitate construction wjrk.

the end of the hearnis connectable with one end of a connection imnber by imans of at I east one threaded ass enb y. The ot her end of the connection umber is connected ith another beamto axially connect the beaim Lo form a support beam x4th a necessary length in accordancc vAth thc grouting arca in construction wrk for supporting the imldboard. Miltiple support beaim can be regularly arranged to uniforniy support every part of the nnldboard.

The present invention can he best understood through the foll ovA ng description and acconpanyi ng dray ngs, herei n: BRI EF lIES CR1 PTI (N CF THE [RAW N Fig. 1 is a perspective vi ewof a first enbodi nmnt of the present invention; Fig. 2 is a perspective exploded view of the first enbodinmnt of the present invention according to Fig. 1; Fig. 3Ais a sectional view taken along line 3-3 of Fig. 1; Fig. 3Bi s a secti onal vi ewof the first enbodi Rent of the present I nvent i on i n anot her as pect Figs. 4A and 4B are perspective vi es of the fastening neirber of the present invention; Fig. 5 is a perspeciive view showing thai the fasiening imnbers are connected wIth the beam of the present invention; Fig. 6 is a perspective view show4ng that the woden bars are mntnt ed on i he beans of the present invention; Fig. 7 is a front view according io Fig. 6; Fig. 8 is a perspective vi ewshowl ng that tw beams of the present I nvent i on are to he connected by a connect i on imrther; Fig. 9is a perspective viewsho4ng that twbeaim of the present I nvent i on are connected by the connect i on neiTher; Fig. 10 is a sectional view taken along line 10-10 of Fig. 9; Fig. ii is a perspective view showing that to beans of the present invention are axially connected by the connection neiTher; Fig. 12 is a sectional view of a second enbodinent of the construction beamof the present invention; Fig. 13 i s a conpari son curve di agr am bet seen the construction beam of the present i nvent i on and four convent i onal const ruct I on beans; and Fig. 14 is a conparison table between the beamof the present invention and four conventional construction beans.

IEFAI LED 1S cR1 PTI U'4 THE PREFERRED ErvBa TVENTS Please refer to Figs. 1 to 3, wIn ch show a first enbodi nent of thc construction bcaml0 of thc present invcntion. Thc construction beam 10 includes a irni n body 20, which is an elongated net al -imde body. The nnin body 20 has uniformcross-sectional shape. The nnin body 20 includes two vertica' wails 21 side by side arranged at a certain interva' in parallel to each other, a top wall 22 transversely connected between top edges of the two vertical walls 21, and two bottom walls 23 inward horizontally extending from hottornedges of the two vertical waHs 21. Each hottornwall 23 has a free edge. M upright walt 24 upward extends from the free edge of the bottomwall 23 by a certain height. Miltiple perforations are forned through the two verti ca walls 21 and arranged in a longitudinal direction of the mu n body 20 at equal i nLerval s near the top edges of the vertical walls 21. Al least two connection holes 27 are forried through the two vertical walls 21 near two ends of the imin body 20 respectively. Each end of the imin body 20 is forimd th to conneclion holes 27 arranged in the longitudinal direction of the imi n body 20. A pr edet er iii ned nuriber of rei nforceirent sect i ons 211, hi ch are recessed/rai sed sect i ons forntd by punchi ng, are disposed on the two vertica' uls 21. A hole is fornud at the center of each reinforcenent section 211. Miltiple through holes 28 are forriud through the two vertical aHs 21.

The vertical wall 21, the bottomwall 23 and the upright all 24 on the sane side of the imin body 20 define therehetween a receiving space 26.

Mdtiple spacer assenhlies 30 are disposed in the imin body 20 at equal intervals. In this cirbodi imnt, thcrc arc four spaccr assenbl es 30. Each spacer as senbi y 30 is conposed of a spacer imnber 31 and a restriction asseithly. The spacer neither 31 is a tubular body having a passage 32. The spacer iienber 31 is disposed in the 1mm body 20 with two ends in ahutrmnt against inner faces of the two vertical walls 21 as showt in Fig. 3A The passage 32 is aligned th one through hole 28 of the imin body. In this eithodinent, the restriction asserthlyis athreadedassenblyincludingaholt 36 and a nut 37. The rod body of t he hol t 36 ext ends t hr ough t he t hr ough holes 28 of the two vertical nlls 21 and the passage 32 of the spacer neither 31 to screw wi t h the nut 37. 8ccordi ngl y, the spacer ricirber 31 is secured beteen the two vertical walls 21. Please refer to Fig. 3A Two ends of the spacer imnber 31 serve as two inner abut nent sections 33 of the restriction asseirHyto abut against the inner faces of ihe two vertical walls 21 respectively. The head section of the boll 36 and the nut 37 serve as two outer abutimnt sections 34 of the restriction asserthly to abut against outer faces of the two vert I ca wi Is 21 respect I v& y. Accordi ng y, the two vertical wal I s are kept spaced from each other by a fixed di st ance \ñ t hout being hi ased toward each other or outward expanded, wbereby the rigidity and strength of the ham body can be iruintained.

It should be noted thai each restriction assenbly can be a ternati vely a rivet 38 as show in Fig. 3B. The rivet 38 passes through the through ho'es 28 of the two vertica' waIls 21 and the passage 32 of the spacer imnber 31. Two ends of the rivet 38 serve as the ouier abuiimni sections 34 to abut against ihe outer faces of the two vertical walls 21, wkicreby thc t%o vertical walls 21 are kept spaced from each other by a fixed distance.

P1 ease now refer to Figs. 4 and 5. The present i nvent i on furt her I nd udes at east one fast eni ng imiTher 40 havi ng a hoard body 41, two upright walls 43 and iwo protrusion walls 45. The board body 41 has a rectangular shape with four lateral sides 42. The two upri ght wal Is 43 are disposed on a pal r of ateral sides 42 of the hoard body 41 in parallel to each other and upward ext end therefrom The two protrusi on walls 45 are disposed on the other pair of lateral si des 42 of the hoard body 41 and downward ext end therefrom The board body 41 and the two uprighi walls 43 define a receiving space 47. The fastening imnber 40 is bridged over the beam 10 with the hoard body 20 in contact with the top waIl 22 and the two protrusion walls 45 in contact with the tw verlical al1s 21 of the miin body respecLively. Aconnection bolt neiTher 48 is passed through the securing holes 46 of the two protrusion wal Is 45 and the perforations of the two vert i ca wa I s 21. the end of the connect i on bolt neiTher 48 has a stopper section 481, whHe the other end of the connection bolt neither 48 is pivotal 1 y connected v t h a stopper neither 482.

After the connection h&t neither 48 is passed through the two protrusionwalls 45 and the two vertical walls 21, the stopper neiTher 482 ll nat urally rotate downward to suspend from the connecti on bolt neither 48 as shown i n Fig. 4A Hider such ci rcuimt ance, the connect i on h& t neiTher 48 i s hi ndered fr oni det achi ng from the fastening neiTher. £1⁄2cordi ngly, the fastening neiTher 40 is connected with the beam 10 by neans of the connection bolt neiTher 48.

Fig. 6 shows the use of Ihi s enhodi nent of the present invention.

Miltiple beans 10 are side by side arranged in parallel to each other at i nt erval s. Several fast eni ng nenbers 40 are imunt ed on the beam;.

MU t i p e wooden bars 70 are hr i dged over the beans 10 and posit i oned in the receiving spaces 47 of the fastening nenhers 40. A fixing neither 49 is passed through the fixing holes 44 of the upright walls 43 of the fastening neiTher (as shown in Fig. 4) to fix the wooden bar 70. The fixing neiTher 49 can he a bolt, a se'f-tapping screw a nail or the like that can fix or connect articles. After the wooden bars 70 are connected with the fast eni ng iienhers 40, a irnl dhoard 71 is placed on the wooden bars 70 as shown in Fig. 7. Referring to Fig. 7, when grouti ng, the concrete is poured fromihe upper side of the im dboard 71 to uni forni y put the wei ght of the concrete on the noldboard 71. The imldboard 71 spreads the ei ght Lo every wooden bar 70. The wooden bars 70 then further spread the ei ghl to the respective beans 10. The wooden bars 70 are fixed by the fastening imnber s 40 so that t he wooden bars 70 I not r andoni y di s p1 ace due to i npact of the concrete. Therefore, the wooden bars 70 keep having higher force bearing strength. The vertical walls 21 and the upri ght wa Is 24 of the beans 10 are right directed in the wei ght direction of the concrete so that the beans are able to bear the ei ght. The spacer nenhers 31 imunted bet een the Iwo verti cal walls 21 of the beam 10 also provide an effect. Two ends of the spacer imnber 31 serve as the i nner abut imnt sect i ons 33 for support i ng the vertical walls 21 and keeping the vertical walls 21 spaced from each other by a fixed distance without inward con! racli ng. The outer abutnent scctions 34 of thc rcstriction asscnbly, (that is. thc hcad section of the bolt 36 and the nut 37). abut against the ouler faces of the two vertical walls 21 to restrict the vertical walls 21 from out ward expandi ng or defor ni ng. Therefore, the two vert i ca wa I s 21 are kept spaced from each other by a fixed di stance to ensure the structural strength of the beans 10. Jreover. Ihe reinforceimnt sections 211 of Lhe beam 10 serve to increase the strength of the beam The two vertical waHs 21 and the two upright walls 24 of the beam stand opposite to each other and are directed in the pressure direction of the concrete. Therefore, the structural strength of the beans 10 is increased and the beans 10 are able to hear greater forward pressure.

In case of arger grouting area and insufficient ength of the II) beans 10, the present invention provides a connection imnber 50 as shon in Fig. 8 to axially connect io beans 10. £1⁄2cordingly, the beans can he assenbl ccl to elongate the hearnto a ength sufficient for supporting the infl dhoard. Mneover, the force hearing strength of the two beans 10 can he increased.

Please refer to Fig. 8. The conponent s of the construct i on beam are identical to those of the first enbodiimnt and thus will not be repeatedly described hereinafter. The saim conponents are denoted th the sane reference nuneras.

The connection neiTher 50 is a net al neiTher including a nni n body 51. wiuichis ahollowelongated body with uniformcross-sectional shapc such as rcct angular shapc. Four apcrturcs 53 arc transvcrscly forned through Iwo lateral walls 52 of the 1mm body 51 near two ends of the nain body 51 respectively. The apertures 53 are arranged in a longitudinal direction of the 1mm body 51.

Two connection conponents 55 are fixedly connected with the muin body 51. Each connection conponent 55 has a substantially ti-shaped cross section. The connection corrponent 55 indudes two vertical leg sections 56 side by side arranged at a certain interva' in parallel to each other and a top board 57 transversely connected between top edges of the two eg sections 56. The top board 57 of the connection conponent 55 is fixedly connected with the bottom wall 54 of the imin body 51. The two leg sections 56 are forned under the bottom of the imin body SI.

II

Four lhreaded assenblies 60 are also provided. Each threaded assenbly 60 includes a boll 62 and a nul 64.

Please refer to Figs. 9 to 11. \Then axially connecting the tw heaim 10, one end of each beam 10 is fitted onto one end of the connection neither 50. The to leg sections 56 of the connection coriponent 55 are respectively recei ved in the tw receiving spaces 26. The connection holes 27 of one end of each beamlO are aligned t h the aper lures 53 of one end of I he connection umber 50. Then, the hots 62 of the four threaded assenbhes 60 are respectiv&y passed through the connect i on ho es 27 of the beam 10 and the apertures 53 of the conneclion nenber 50 to screwith the nuts 64.

Acordingly, the twi beaim 10 are securely connected ith the conncct i on nunbcr 50.

The connection neither 50 can be used to axially securely connect at least tw heaim 10. Preferahl y, the tw leg sections 56 abut against the bottom ils 23 of the nuin body 20 as showi in Fig. 10. AJso, the top end of Ihe connection neiTher 50 abuts against the top wall 22 of the 1mm body 20, whereby the connection neither 50 a'so serves to increase the force bearing strength of the 1mm body and enhance the supporting effect of the beam 10 for the nnl dboard.

After t o or rmre beaim 10 are axially connect ccl. nore woden bars 70 can be fixed on the beaim 10 by imans of miltiple fastening neither s 40 for support i ng a I onger irnl dhoar d.

Fig. 12 shos a second enhodinent of the conslruction beam 10 of the present i nvenli on. The sane conponent s are denoted i th the sane reference nurier a s. In t hi s erthodi nent, the spacer as senN y I s an ci ongat ed (t uhu ar or cyl i ndr i cal) spacer imnber 39 pas si ng through the through holes 28 of the tvo vertica' walls 21 of the imi n body 20. The ci r cuirference of each of two ends of the spacer neither 39 is for Reed with an inner abut Rent flange 33 and an outer abul nenl fi ange 34. The i nner and outer abut nent [1 anges 33. 34 respectively abut against Ihe inner and outer faces of the two verti cal wa Is 21 to keep the two verti ca Is 21 spaced frorneach other by a fi xed di st aiice and ensure that the beam has suffi ci ent strength.

Thc construction bcainof thc present invention is advantageous over other consiructi on beams on the current imrket. The beam of the present invention is conpared with the other four convent i onal beans A, B, C, D i n hendi ng imnent and perfor rmnce per unit pr i cc as foflows: Fig. 13 is a conpari son di agram bet een the present invention and the four convent i onal beams. The t hi cker the UI oor board to he grouted is, the shorter the distance between the arranged beams is.

A 1 ar ger bendi ng imnent of the beam neans a greater force bear i ng strength of the beam In this case, the beam is imre urflikely to break. Therefore, a beamwi t h larger bending nunenl is able 10 bear greater load and the distance bet een the arranged beams is also I onger. The hendi ng imnent Mi s ca cu at ed by yield strength (Fy) milliplying section mxlulus (Z).

Please a] so refer to Fig. 14. The preferred erthodi iient of the const ruct ion hearn(ahhrevi at ed as top heai$ of the present invention is nude of 0390 steel imterial with a yield strength (Fy) of 4000kgf/cni and a section nodulus (Z) of 26.2cnL Acordingly, the bending minent (M of the beam of the present invention can he calculated lobe 4000 X26.2= lO4800kgf-cm The eighl of the beam of the present invention is 6kg/in The price per kilogramis NT$(as hereinafter) 45 doHars/kg. Therefore, the performance of the beam of the present invention per unit price is 104800/(6kg/ni45 dollars/kg)=388. l5kgf-cnldollar.

BcarnA(EFOE-beaid has a trapczoidal cross section. The yield strength (Fy) of bearnAis 3600kgf/ci4 and Lhe section imdulus (Z) of beam A is 28. 6cmff. Accordi ngly, the bending imnent (M of beam A can he calculated to he 3600 X 28. 6= 102960kgf-cni The wei ght of beam A is 5.5kg/rn The price per kHogram is 106.7 dollars/kg.

Therefore, the perforimnce of beam A per unit price is l02960/(5.5kg/nfl06.7 dollars/kg)=175.40kgf-cnldollar.

Beam B (Ii ghtei ght channe' ed steel, tw pieces) is an I-beam The yield strength (Fy) of beam B is 2SOOkgf/cm2 and the secti on imdul us (Z of beam B i s 33. 6cnL Accordi ng y, the hendi ng mnrent (M of beamB can be calculaLed Lobe 2500 X33.6= 84000kgf-crn The ei ght of bearnBi s 8. 2kg/rn The price per ki 1 ograrni s 28 dollars/kg.

Therefore, the per for rmnce of beam B per uni t pri cc i s 84000/(8.2kg/niK28 dollars/kg)=365.85kgf-cm'dollar.

Beam C (1-Pb wioden heari is a woden beam Through test, the bending nrnmnt of beam C I s found to he 50968kgf-crn The ei ght of heamC i s 4. 7kg! rn The price per ki I ogr ami s 83 do] ar s/kg. Therefore, the perforimnce of beam C per unit price is 50968I(4.7kg/nI83 doll ar s / kg) =130. 65kgf -c nI d& I ar.

BeamD(lighteight channeled steel, one piece) is a C-beam The yield strength (Fy) of heamDis 2SOOkgf!cm2 and the section imduus (Z) of heamDi s 16. 8cnL Accordingly, the bending nmmnt (M of beam D can be calculaled to be 2500 X 16.8= 42000kgf-cm The eight of beamDi s 4. 1kg/rn The price per ki 1 ogrami s 28 dollars/kg. Therefore, thc pcrforniincc of bcam D pcr unit price is 420001(4. 1kg/nf28 dollars/kg) =365. 85kgf-cnl dollar.

Accordingly, it can he found through the colipari son bet ween the hendi ng nrnmnt (M of var i ous heaim t hat t he beam ( t op heai$ of the present invention > beam A (EFO E-beanj > beam B (lighteight channeled sled, tw pieces) > beam C (1-PD wooden bean > beamD ( i ght wei ght channel ed steel, one pi ccc). The hendi ng imntnt of the beam of the present invention i s the best one. In other words, the beamof the present invention has a greatest force bearing strength for bearing highest action force. Please further refer to the conpari son diagram bet een the perfornunces of the beaim per uni price. In sequence, the beam(top bean) of the present invention > beam B ightweight channeled steel, two pieces) = beam D (lighteight channeled steel, one piece) > bearnA(EFWE-bean > bearnC (1-flO woden beanj. The bearnof the present invention still has a hi ghest per for trance. Thi s neans the beam of the present I nvent i on can pr ovi de better supporting force at the sane cost.

Mn cover, the price per ki I ogr aniof the heamof the present i nvent i on is even less than one half of the price of beainAwth the second best hendi ng imnent. Thi s ireans the sane rmney can on] y buy one beam A hile tw beams of the present invention. The assenbly of to side by side arranged beams of the present invention can achieve a hendi ng imirent irnch hi gher than the hendi ng imirent of beam A l-hever, the price is still tess than the price of one beam A Therefore, the beam of the present invention not only has a solid structure, but also is qui i.e advantageous over the convent i onal bcairs in cost-pcrfornrincc ratio.

Furthernore. according to statistics, the average bearable carriage weight of a hunan at one tine is not over 25kg. In the present i nvent i on, even i f t hr cc beams are ass eniil ed i nt o a onger beam the xei ght of the assenbl y including the ei ght of the connection imnbers is not over 23kg. This value is loer than the average bearable carri age ei ght of a huimn. Therefore, even a t hi nner and shorter person can carry the beams. Therefore, the beam of the present invention has the advantages of better structural strength, hi gher cost -perfornnnce ratio and i ghtei ght. Al so, the bearnof the present invention is easy to carry without causing heavy burden to construction orkers.

Claims (10)

1. Wial is clained is: 1. A construction heaii hi ch i s an ci ongated body, conpri si ng: a imi n body, whi ch I s an ci ongat ed body havi ng uni form cross-sectional shape, the nain body including two vertical walls side by side arranged at a certain interval in paraflei to each other; a Lop wall transversely connected be1een top edges of the Iwo vertical walls; Iwo boLtorn walls inward horizontafly extending from bottom edges of the two verticai walls, and two upri ght w&ls upward extending fromfree edge of the bottom walls by a cerlain heighl; irultiplc through holes fornrd through thc two vertical walls of Ihe mtin body; and infitiple spacer asseith].ies passing through the through hoies of the two vertical wafls of the 1mm body, each of two ends of each spacer asseubly being forimd with an inner abut nent section and an outer abutnent section, the two inner abuiimnt sections of the spacer asserrblyrespectivelyahutting against inner faces of the two vertica' waMs, while the two outer ahutnent sections of the spacer assenbly respectively abutting against outer faces of the two vertical wails.
2. 2. The beam as cl ained in claim I, therei n each spacer assenbly is an ci ongat ed spacer neither, the two i nner and two outer abut nent I, seclions being respeclively forimd al two ends of the spacer imither.
3. 3. The beam as claintd in claim 1, herein each spacer asseiThly includes a spacer imrther and a restriction asserrbly, the spacer neither being a tubular body having a passage; the restriction assenby having two ends and being passed through the through holes of the two vertical walls and Ihe passage of the spacer neiTher. Iwo ends of the spacer neiTher serving as the two inner ahutimnt sections; two ends of the restriction assenhly serving as the t vvn outer abut imnt sect i ons.
4. 4. The bearnas claiimd in claim3, therein the restriclion assenhly is conposed of a bolt and a nut, thc bolt having a head section, the head section of Ihe boll and the nut serving as the Iwo outer abutnent sections.
5. 5. Theheamas claiimdincairn3, hereintherestrictionassenbly isarivel, twoendsoflherivetservingasthetwoouterabutimnt sect i ons.
6. 6. The heamas claiimd in daimi, Wierein rniltipe perforations are forned through the two vertical nlls of the imin body, the perforati ons are arrangedi n a ongitudinal direction of the nai n body at equal intervals and near the lop edges of the vertical wlls. lx
7. 7. The beam as claiimd in claimi, wherein: infitiple perforations are forntd through the two vertical uI I s of the imi n body and arranged in a I ongi t udi nal di rect i on of the nui n body; and further corrpri si ng: a fastening neither having a board body, two upri ght wal s and two protrusion walls, the board body having at least four lateral sides, the Iwo upri ght walls being disposed on a pair of lateral si des of the board body and upwar d ext endi ng fr ornt he board body, the board body and the two upri ght wal Is defining a receiving space; the two protrusion walls being disposed on the olher pair of lateral sides of the board body and donward extending from thc board body, each protrusion wall having at least one sccuring holes; the fastening imnber being disposed on the top wall of the nnin body; at least one connection bolt irenber being passed through the securing holes of the two protrusion waIs of the fastening imrrber and the perforations of the two vertical wal I s of the nuin body to connect the faslening ntnber with the 1mm body.
8. 8. The beam as daiimd in any one of claiim I to 7, Wierein the vertical wall, the bottornwall and the upright wall on the sane side of the nai n body define therehetween a receiving space; the beamfurt her conpri sing a connecli on imnber including a imi n body, which is a hollowelongaled body and two vertical leg sections disposed under a bottom face of the Rain body; one end of the connection neiTher cxl ending into the imi n body of I he beam wi I h the two leg sections posilioned in Ihe Iwo receiving spaces.
9. 9. The beam as ci ai ned I n any one of ci ai im I to 7, wherei n: at least two connection holes are forired through the two vertica' wails of the irain body and near two ends of the nain body respeclively; and the vertica' w&i, the hottornw'aH and the upright will on the sane side of the imin body define therehetween a receiving space; the beamfurther conprising a connection nenber including a 1mm body, which is a hollow elongated body and at least. one connection conponcnt having two vcrtical lcg scctions and a top board connected between the Iwo leg sections; the connection conponent being fixedly disposed under a hot t outface of the nni n body; at least two apertures being transversely forned through two at er al wa] s of t he connect i on neither and near two ends of the connection neither respeclively; one end of the connection neither extending into the imi n body of the beam at leasl one threaded asserrbly being passed through the apertures of one end of t he connect i on neither and t he connect i on ho es of one end of the mm body of the bearnto connect the connection irenber with t he imi n body.
10. 10. The beam as claiimd in claim 9, wherein the apertures of the connect i on neither are for ned through the imi n body of the 21) connection nenber.

    ii. A construction beam substantially as hereinbefore described th reference to and as show in Figures 1 to 12 of the accorrpanyi ng dr añ ngs.