US2325614A - Lintel - Google Patents

Description

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Since itis desirable to usey reinforcement that will not interfere with `regmlar brick coursing,

and since the usual joint is 1/2 inch thick, the

' reinforcement may consist of a flat bar 1A; inch thick, oranyother 'cross-sectionally shaped bar not exceedingv 1X2 inch in'thickness, which vmay be laid in the `joints without increasing their thickness. The following table may then be resorted 'to to insure adequate strength in lintels:

Span (feet) "1r-'rom the foregeing'tabieiit .will be seenfthat for any opening up to 9 feet; a steel barV capable f safely standinga stress of 10,000V pounds perf Y square incli- Will be ample reinforcementif'4 only -1/8,V of en men by 3V1000 of Van inch,- provided of f i course that the rigidity of the masonrycan be assumed. From'experience itisk/'nown thatffailures are due primarily .to settlements,v rather than to loadY stresses. However, to' insure against imsur'ned as a. vpossibility,the steel 'shouldbe in. creasedto' include; amount. -suiicient for a roofs',bearing on thewal'l, also add'v to the stresses lwhichf areliab'le to occurf vEvenllo'ylth'e inclusion of -1 'additional' steell Y t0 insure adequate strength in-V the eventor unusual, but possible.,l stresses and n loads.' the ysize Vof" the 'metal reinforcing bar -in-VY corporated in my inventionis radically less/than Y perfect workmanshipLwhich ,must always be asreasonable saiety`iactor.-'The loads' ofiloors and equipment, 'other Vthan a light centering frame for the irst courses until the cement hardens, and that when constructed, in accordance with therforegoing, will subject 4thesteel portions of the lintel to. shearing stressonly.

Having described my invention vand the ymethod 'of constructing the saine, what I claim side Walls of said opening, and bonding material betweenrand securing said blocks together,

said -lintelwcomprising a metallic VreinforcingV y membertsuperimposed upon said course spanninglylof said opening andyhaving over all Cross .sectional dimensions 'lessl than' 'those Aolf the ,norrv 'mal space between said: layers, and ties formed inf endless loops supported1by said metallic reinforcing/ memberv Yfor securingfsaid spanning j course of` .blocksv'utof 'saidfrein'forcing member,-

.2. 1A` lintel" for` door `or.' window openings of a building formed of `spacedsuperimposed layers of preformed building blocks, said 4lintel".com/pri sn ing;-.the combination of' ai course oi"building blocks'spaeed Vinend to end relationnspanningtheV 4 side walls'of saidopeningbonding 'materialvbee the'alnount of steel heretofore considered-necesn' sary for angle and'F11-iron'lintels;Vv r

In brick lintels there is a possibility ofcourseVV f that'thevbricks of the-rstcourse across the Yopening'fmay drop out vdue to imperfect bonding. This according to-rny finyention is guardedA against by anchoring'the' bricks to themetalre- 'inicrcing'f bar bythe tie loops le insertedin the ,Y Yvertical'joints betweenfthat-course of the-bricks.

v Myr'invenol@ 'heefore comprises f the eQm bnatm With bnckfiinteis of a reinforcing metai bar interposed-between'courses Vor within a hori- 'i' `zontal joint of the building blocks or bricksV above Y the opening torba-spanned and extending `intoY -the sidewalls of the opening sufficiently to'fsecure adequate' boniand'r form a rigid structure. The

fl'fcombination also includes 'ties securing therst brick course of the' lintelfto the re'inforcing`bar,

theY cross-sectionalarea -of the' metal bar beiner at least -as great as Vthat.calculated by :the iollowin'ggeneric formular@ f v (nieta:

Ij,rspanyxrhieiiness kiiieeox Weight per up fr.

i Y i safe shearing stress (lbs.r persqrinr.) f

^- .spanrx ,Tiiieknessiofx Weight perf l wallV (in feet) 'Y cu'.A ft'. 8 Vsafe shearing stressj(1bspersq. in.)

thezforegoing it..w ill loevseenA thatthe relinforcingbar and the tie wires. maybe placedV inpostion Vby a brick-layerinlthe Ordinary course tween andsecuring said blocks together, a rne-Y tallicl lreinforcing `inei'nb'erf'superimposed rupon Y saidjcourse 'andlfia/"irigY over all cross sectionall dimensions less than those vHof. the normal space between said layers, and ties-formed "in endless loops around said' reinforcing memberjembedded in' Vsaid bonding material "securing said span'ijiing course of blocks to saidA reinfarcingYrr'iernber;L

SiVAlintel for, door orlwindowopeningsiof a building" formed of spacedV vsuperlclposed layers Vof preformed buildingvbiocks-gsaid lintel comprising the combination` of al course vof building blocks spaced in enditole'nd relation spanningthe side walls of saidopening,"bonding material fbe# tween andfsecuring saidblocksY togetheigities iormed in endlessvloopsembeddedrwithin andV partially extending from said ,bonding material,

A a substantially`v fiat reinforcing Vmember supern `building formedy of spaced superimposed layers of preformed building fblocks2 jsaid lintel com- V55,1;)rising the combinationvyof'two courses of'v build-A spanningganopeningrin thefbuilding, bondingl A of construction without requiring :specialy sliill or imposed'upon`said course and'spanningV said VOpenings surrounded by a plurality-of said ties,

said course of-blocksibeing secured to'said mem.- yber, by the extending' portion of Vtheties embedded therein.

It. `lntelfor door or windowopenings cfa ing Vblocks A'superimposedonev Aupon the other` and material between and securingthe blocks of each coursev in Vend to 'endf relationship, .ai metallic re,-

iniorcng member Vbetween rsaidcourses encased within the side :walls/of said vcourses; by bonding materiaL- andra plurality of ties formedin iendless loops surroundingl said metallicl *reinforcing membersecuri'ngthe lowermo'st course ci' blocks ofsaid lintel to said Y.reinforcing member.

' JonNl @KL-ABER.

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