US2058364A - Strut and antishearing member for girders - Google Patents

Description

Oct. 20, 1936. H. soRENsYEN 2,058,364

STRUT AND ANTISHEARING MEMBER FOR GIRDERS Filed Jan. 16, 1936 n I i gv by W F'gf 17 Af 5 31o@ 361810 1 18110 INVENTOR Patented oct. 2o, 1936 Y f 2,058,364.

UNITED STATES PATENT oEFlcE-jl STRUT AND ANTISHEARING IVIEMBAER FOR GIRDERS Henry Sorensen, Los Angeles, Calif.

Application January 16, 1936, Serial No. 59,419

5 Claims. (Cl. 'Z2-'11) y I desire to obtain Letters Patent on a device 3, and wedges'l'are thereupon driven into looped which will greatly benefit the modification of ends 8, which extend from between 3 Aand4 .to a structure shown `in my U. S. Patent #1,716,710, suitable distance beyond the edges of 3 and A4so June 11, 1929 and my U. S. Patent #1,785,214, that wedges I are driven against the edgesvof 5 Dec. 16, 1930, or any other structure for which flanges 3 and bars 4, thereby locking loopedV ends my invention, herein, may be adapted. 8 to flanges 3 while holding reinforcements Iv in My invention, herein, consists of a simple maninitial tension. In this manner wedgesl I0 lock ner to arrange strut and anti-shearing members and connect reinforcements 1 in initialv tension for girders. with girders I and 2.

10 I have described my invention, and shown the It will be, further, understood that .no initial l0v same, in the following specification and its actension can be maintained in reinforcements v1 companying drawing, of whichzunless I provide the structure with an adequate Fig. 1 illustrates the side view of the fragment strut resistance to prevent the lateral deflection of a steel frame structure containing my invenof girders I, when wedges I0 are drivenf-girders tion. 2 having an equal draw on both of `their sides, and 15- Fg. 2 is a plan View of part of the structure in my above referred to Patent #1,716,7101 havel shown in Fig. 1. claimed, as my therein contained. invention in Fig. 3 is a fragment of the end View of Fig. 1 its broad sense, the principle of means to strut. taken at I-I. the supports against the above referred tovdraw Fig. 4 illustrates Fig. 1 embedded in concrete. brought about by reinforcements 1. In my abovev 2 Fig. 5 is the fragment of a plan view which referred to Patents #1,716,710 and #1,785,214. I

illustrates a further part of my invention. have illustrated the strut means contacting thev Fig. 6 illustrates a modification of the strucwebs of the girders, or beams, with: the initially ture. tensioned reinforcements locked to their4 top Similar numerals designate similar parts, and flanges, but due tol the fact that these reinforceas numeral I designates the outside Wall girder of ments exercise a onesided draw on the outside a steel frame structure. 2 designates an inside girders, or beams, it is apparent that said top girder. 3 are the top flanges of girders I and 2. flanges, reaching above the strut means, become 4 designates llat bars. 5 are spacing members. subjected vto shearing strains, and the onesided 6 is a strut member indicated by broken lines. draw also has a, tilting effect on the top parts of 36' 1 are reinforcements. 8 are looped ends of rethe outside girders.

inforcements 1. 9 is seam welding. I0 are After having dealt. with the above I amV new wedges. II are members that assume a strut and` coming to that' which constitutes my invention l anti-shearing action. I2 is the bottom flange of herein.

girder I. I3 is the web of girder I. I4 is the In Figures 1, 3, and 4 I have illustrated my 35 outside edge of flange I2. I5 is the point of coninvention to protect flange 3, of girders Il, against tact between flange 3 and web I3 on the outer the onesided shearing strains, caused by reinside of girder I. I6 is bracing material. I'I is forcements 1, by attaching members Il' to the concrete. I8 is a column. I9 are other members outerside of girders I. I prefer to seam weld 40 that assume a strut and anti-shearing action. the one end of members II, preferably, to edge 40 20 is a strut supporting beam or other means of I4 of the bottom flange I2, of girder I, and I strut support. attach the other end of members III, likewise To the top flanges 3 of girder I, and girder 2, preferably seam welded, to top flange 3 of girder I attach flat bars 4. Bars 4 are spaced from I, preferably at contact point I5 between flange 3 flanges 3 by means of spacers 5 and I prefer to and web I3, all on the outside of girder I`. Mem-v 45 attach members 3, 4, and 5 together by means bers II have a slanting position between points of welding, while having members 5 suitably I4and I5. I place members II at suitablelgi'n'"" spaced. Spacers 5 and flat bars 4 thus become tervals. f. 1 one with flange 3 and form a spaced double top Due to the position, which IIglfiave givenmeinflange 3`for girders I and 2. Bars 4 and flanges bers II, the followingeis"'evidenti-When the 50 3, preferably have the samevwidth. draw from reinforcinentsl'l asserts itsl strength Reinforcements 'I have looped ends 8,as shown on flangey '3, that draw will awaken a tensileacm Fig. 2, that are held together by means of .Y tion -in memberslt, which is of the same strength seam welding 9. These looped ends 8 areY passed as the draw infreinforcements 'I1y andl this tensile through the spaces between bars 4 and flanges action, in members II, then assumes a strut and 55 anti-shearing action against the draw which is exercised upon top flange 3 of girder I by reinforcements 1.

Whenever I deem it advisable I add bracing material I6, between web I3 and the outside part of ange I2, in order to supply flange I2 with whatever resistance may be required to hold the tensile action in members II.

'Ihe broken lines 6, on Fig. 1, indicate the removable strut as illustrated in my above referred to Patent #1,785,214, and the firm manner in which device I6 braces flange I2 against the indicated strut member 6 will readily be understood, besides which girder I becomes -materially stiifened thereby. I prefer to seam weld member I6 in its position. Strut I is removeable after concrete I1 has become hard and concrete II then assumes the strut action -of 6. These references to bracing material I6, which I have just now made, also hold good With regard to the non-removeable strut, which is disclosed in my other above referred to Patent #1,716,710.

As reinforcements 'I exercise an equal draw on both sides of girders 2 itis not necessary to supply girders 2 with members II.

I have illustrated the most important part of my invention in Fig. 5 in Which I have shown other strut 4members I9, which I attach in a lslanting position from the inside edges of ange 3 of girders I to girders 2, placing these members I9 one on each side of column I8. Members I9 thereby protect the connections, between girders I and column I8, against shearing strains caused by reinforcements 1, these members I9 assuming the required strut and anti-shearing action to protect the said connections (not shown) which hold girders I to column I8. These strut members I9 also counteract any inwardly tilting action, which may manifest itself in girders I and to which I have made reference in an earlier part of this specification. Whenever I so deem it advisable I place a series of slanting members I9, paralleling each other, between girders I and 2. Y

Girders 2, together with reinforcements 1, reach fromeither side of the building to its opposite side. The draw, caused by reinforcements 7, has therefore a tendency to clamp girders 2 together, and there can be no lateral movements on girders 2, due to the equal pressure, on both sides of girders 2, by strut members I9.

Girders 2 are always placed in an angular relation to girders I, and when I position my strut members I9 slantingly between girders I and 2 I automatically transplant the strut action of my members I9 to girders 2. Girders 2 reach between the opposed girders I. The opposed girders I, that are located inthe opposite outside walls of the building, are all furnished with the slanting strut members I9, above described, whereby members I9, through the intermediate inside girders 2, can serve the purpose to clamp the full length of the opposed outside wall girders I against each other. Girders 2l are an essential and indispensable part of the steel frame structure, and had I not made my novel and simple invention of placing my members I9 in their slanting position, as above described, I would have had to use added material, between all of the intervening girders 2, to transplant the strut action from outside wall girder I to its opposed outside wall girder I.

I may also attach reinforcements 1 to4 the bottom anges of girders I and 2 and, in such case, I attach reinforcements 'I and strut members I9 to the bottom flanges of girders I and 2 in the same manner, as above described, in which I attach members 'I and I9 to the top flanges 3 of girders I and 2.

Fig. 6 is a plan view of a modification of my invention in which strut supporting means 29, herein shown as a beam, is attached to the inside web I3 of girder I. The one end of members I9 is attached to the inside edge of top flange 3 of girder I, in a slanting position, as explained under the description of Fig. 5 above, While the other end of strut members I9 is attached to the strut supporting beams 29. Members I 9 are placed on both sides of strut supporting means 20, and then serve the purpose of counteracting the strut and shearing strains on ange 3, of girder I, caused by reinforcements 1.

The arrows indicate the direction of the draw brought about by reinforcements 7. y

Various other modifications may be made without departing from the spirit of my invention.

I claim:-

1. In a series of girders in rectangular formation which form a floor span with reinforcements extending from one girder to the opposite including means to initially tension rand lock said reinforcements to the flanges of said girders and members adapted to strut said girders, the combination of said strut members intermediate the adjacent interior sides of said girder rectangular formation.

2. In a series of girders in rectangular formation which form a floor span with reinforcements extending from one girder to the opposite including means to initially tension and lock said reinforcements to the flanges of said girders and members adapted to strut said girders, the combination of said strut members intermediate the adjacent interior anges of said girder recta-ngular formation.

3. In the outside girder of a rectangular girder formation which forms a floor span with reinforcements extending from one girder to the y opposite including means to initially tension and lock said reinforcements to the anges of the said girders and members adapted to strut said girders, the combination of said strut members intermediate the inside o-f said outside girder and those interior sides of said formation which contact said outside girder.

4. In the outside girder of a rectangular girder formation which forms a floor span with reinforcements extending from one girder to the opposite including means to initially tension and lock said reinforcements to the flanges of the said girders and members adapted to strut said girders, the combination of said strut members intermediate the inside of the flange of said outside girder and those interior sides of said formation which Contact said outside girder.

5. In a series of girders in rectangular formation which form a floor span with reinforcements extending from one girder to the opposite, said reinforcements in initial tension locked to the top flanges of said girders and strut members intermediate the opposed interior sides of said formation, in combination with tension absorbing material positioned on the outer parts of said girder formation between the lower ange edges and the points of contact between the webs and top flanges.

HENRY SORENSEN.

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