CONCRETE WORK

APPLICATION OF GENhPAL - coNDriIoIS:

All of the works described herein aie subject to theforegoing General Conditions, these General Conditions becominga part of this Specification, and all work shall be carried onin accordance therewith.

l CLIIDiD:

This contractor shall include any and all plain andreinforced concrete including steel reinforcement bars andmeshing and all cement work for the entire uild1ng all as shownon t-'e drawings or described in the specifications, exceptexterior and Interior cement plaster which will be done by theplastering contractor.

CE FNT:

All cement shall be a first-class Portland cement, ofbrand approved by the archtoct, free from hard lumps and allforeign material. It shall be delivered on the work and storeda water tight shed in t'-e original packages, in good condition,properly labeled and must be well protected from rain and damp-ness, and. shall be in anuni-njured and uerfect condition at thetime of use. !li cement shall conform to the standard specif-ications of the American Society for Testing Vaterials. Cementmust be delivered at the site a sufficient ti!ie in advance ofrequirements to permit tests to be made before needed. for use.

TETIiTG OF CPhT:

All cement shall be tested according to methods of theAmerican Fociety of CivIl.nginers. At least six samples per5OO-barr.e 'ots shall be taken. Proper care shall be exercisedto separate the losts, so that they can be easily identified iffound unsatisfactory; and no cement shall be used until theseven day test has proven atisfactory.

S.\ND:

Excert where otherwise specified, all sand shall beriver sand, free from loam, silt, dritwood, or other impurities,Sand shall not contain over 3. of clay, passing a 100-mesh sIeve,and clay must be silicious clay. ll sand shall be well gradedfrom coarse to fine, and no particles shall be over " in size.No silt coated sand will be allowed.COAIk:L GCrFIGATL:

All coarse aggregate shall be either crushed rock orriver gravel, It shall be clean, h.rd, free from all dust, loamsilt and other impurities. All coarse aggregate used in rein-forced concrete and concrete over water-proofing, shall be ofsuch size that will pass through a three-quirter inch ring inany direction; coarse aggregate used In plain concrete to passthrough a one and one-half inch r1n. All sand an.d fine stuffshall be washed and. screened out.

IXIiTG OF CONCRETE:

Concrete shall be mixed in an approved mi±ing machineunless permission 13 obtained from the architect to mix by hand;in either case all concrete shall be mixed to his entire satisfaction,and no concrete shall be placed in the work until each partic]eof stove is thoroughly covered wth mortar and a uniform mixtureis obtained..

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18.

Sufficient water shall be used to produce a v;et mix,hut not enough so that the concrete will be slopy in the wheel-barrows, with water standin. at the t before deposition. Noconcrete that is not perfectly mixed will be allowed to be pouredin the work, same will have to beremixed or thrown away.

Concrete shall be mixed in t* fo1lowin proportions:

For all plain concrete ------------------------- 1-3-5II IV reinforced concrete work ---------------- 1-2-4II ft concrete over water-proofing ------------ 1-34

All parts, including water, are to be c r' ratelymeasured in bins or boxes before being mixed.

DTATO\TITP:

Platomite, manufactured by the Atomite Corporation or approved,shall be added to all concrete In the proportion of threq (3pounds to each bag of cement.

FLACITTC CONCPETF:

Coiurns for each floor shall be filled to the heightof the bottom of the deepest intersecting beam or girder in two0: more oporations. tfter columns are filled, sufficient timeshall elapse before work is continued on the floor, to allowshrinkage of concrete in columns to take Diace; the beams,girders and. floor slabs are to be laid as a monolth. Allconcrete shall be thoroug1'ly spaded in and. around all reinforc-ement and along all form surfaces. If concreting is stoppedbefore an entire floor Is completed, the stop shall be made Int'e center of the beam anT center of floor slabs. The planeswhere concrete work is stopped must be at right angles to thedirection of the snan of slab. In no event shall work beterminated in beams or floor slabs w'ers future shearing actionbecomes great, as at their ends or directly under a heavyconcentrated ioac. 'Before work Is resumed, te old work shallbe cleaned with a wire brush and' painted with. a neat cementprout.

The top of all concrete work shal], be thoroughly1eaned of

"liit-arce'r and foroigh matter, and soaked with. water,)efOre any new work (brick or concrete) is started on top of3anle. ,Forrs bond between new and old work ri:th neat cementrout.

If concreting of walls or footings is stopped beforen entire wall is completed, Carlo shall be stopped against;imber bulk-heads arranged in form of steps with 12" risers and18" tro.ds, with a 4 rectaigular or "V" slot in riser to providekey for new work.

All grounr that absorbs watr shall be soaked withiater before concrete is 'ol-ced against it.

Contractor shall notify architect at least twelve (12)ours in advance of Trouring of any concrete.

CTECTICN AND UETTING 1)OVN:

Protect all concrete in an approved vaiot :eathor. i'o concrete shall be?laced duringll concrete and cement finish, shall be wetted attimes a day for at least four days after placing.,the weather, or as directed by the architect, andgreen concrete will not allowed.

during cold orfreezing weather.least threeaccording towalking on

19.

FChIig :hD Or:K:

ood forms shall be built for all concrete, excentpavement and all forms shall be watetiht and constructed ofsound lumber in a thorough and substantial manner and shall be'ell braced to prevent any distortion. All forms and falseworkshall be able to carry dead loads, including -wieght of constructionconsidered a:. a liquid, without deflection. All lumber adjacentto concrete shall be planed to uniform thickness, shall be laiduith tigh.t joints toprevent cement from escaping, and shall hefree from shake end 1ooe knots. Yor for slabs, beans llntolso snandrols shall. be arranged to be given a cs.mber so as toleave the work perfectly horizontal after setting.

\Th,ere concrete joist floor construction orrurs useremovable steelfors, as manufaQtured b the steel form contractingCo., or approved.

All sh.eat:ing of forms for concrete that is to beplastered shall have one side undressed and that side shall beplaced toward the concrete so as to roughen same.

Forms for all walls shall be shiolap nailed right on2nx4 stud.s ulaced edgorrise not over two feet (2') on centers;same to be tied with 12 gal. Iron wire alaced not over twofeet (2') on centers in all, directions, and braced hor±zontallywith 4x4 not over 4 feet apart. all forms for columns, beams,suandrels and lintels shall be amuly supported and thoroughlybraced in all dirocti'ns.

Forms for roof or other flat slab shall he shiplaplaid tight on 2x6 not over 2'-O" apart, resting on 4x4 posts.well braced in all directions, w'ere"steelform" is used sames-all rest or 2" thick nlank suprorted on 4"x4" nosts, al].to the satisfaction of the arc'itect,

Provide openings at bottom of all forms fox walls,columns, piers, etc., to facilitate cleaning of' same.

Then forms are completed, all chips, blocks, shavings,:-awdust, etce, must be entirely removed by sweepin, or with astream of water. After the steel is in place and before theconcrete is deposited, all forms must be thoroughly washed andso'.ked with water from a hose.

Falsework shall not he removed, until the concrete isthoroughly set, and is of su.ff ient strength. to carry its ownweight, together with whatever live load is liable to come on theconstruction and no faisework shall be removed withou the permissionof the architect and his permission will. not relieve theôontractorof all responsibility for any failure or damage.

'fter the forms are removed cut all wires flush with.wall, where concrete surface s not plastered wires shall becut neatly so as not to mar concrete s.urfaces.

o wood. door or window frames shall be used as part offorms, All fraeos shall he set after concrete has been poured.

20.

STEEL TliFORCEMENT:

All stee reinforceing bars shall he round mechancialbond, or approved type, all of sizes shown. It shall be newbillet steel, or rrol1ed rail steel, fully complying with t'nestandard specifications of "medium steel", or for Rail Steelconcrete reinforciig bars of te rnerican Society for Testing1aterials. ll reinforcing steel including meshing shall betree from rust, scale, oil, paint, or coatings of any characterwhich will tend t reduce or destroy the bond.. Before placing allsteel shallbe benZ true to templates as required by the drawingsor speci1ications, Care shall be taken in handling to preservethe shape of each piece, and in setting, to place each niece orgroup of pieces ii its proper location.

All steel shall be securely wired and held in placewith wire in columns, beams, girders, etc., steel shall besupported in place ith approved metal supports. All rodssh'all be carefully shaken during construction to allow concreteto get het'::een steel nd foris. In slabw half of the barsmust be raised over the support to within 1" of the ton o' theslab and in coJuins, beams, girders, etc., steel shall, havenot less that lb-" concrete fire protection.

Contractor shall furnish the architect one set ofBlue prints of all placing diagrams and bending details for approval beforedelivery of any steel i; made. P0 Steel shall be placed in girders,beaas, lintels or slab, until concuete in columns, piers orwalls has been poured up to bottom of lowest girder, beam,lintel or slab.rCTjt'ATIT5.

Build all concrete foot!ngs, foundations and walJ.s,of building terraces, etc., of dimensions shown on plans; care-fully place and tamp all concrete; crry down all foundations todepths shown on plans, or to a deth directed by the architect;and no foundations shall be placed on filled ground. BeforepOuring concrete of any footing or r'averient check up grades,and tamp dirt to a true, sooth and hard surface under pavement.CONCRETE DUCTS:

Build all concrete heat ducts shown or specified same shallbe reinforced where shown and all interior surfaces of concreteshall be smooth and. true and all wire cut flush with concrete.ffT1:RIQP COPCRI:T rA:.11T:

Lay a 3 bise of 1-3-5 coiicrete over the entire areaof ground floor fan roo:i, nntries, areas, etc., Therver finishedfloor Is shown to be 'rood as in ball room etc., top of baseshall be 3" be-low finish floor line and in Soda fontain rooi andtoilet rooms The top oi slab-s shall be brought to an even.true surface.

Concrete base shall not be laid until all sewer andother ripes are laid and. ground leveled off ad thoroughlysoaked and tamped and accepted by the architect. All concretebase laid. over filled ground shall be reinforced, with O32American :'teel & iro Co. or approved fabric.

21.

On top of base, except where other finished flooTingis shown or called for lay sJ4Ithick top layer of cement mortaras speci.fied under "Cement Finish". Floors and areas shall bepitch.edto drains where sown or directed.

INTIOh AND EXTi5IO . CONCRETE ST'JRP & FTEPS:

Build all interior concrete stairs and all exteriorconcrete steps of all entrances to building and terrace,allreinforced as shown on plans and scale drawings carefully layout the .';ork and pour concrete all in one operation. Thiscontractor shall furnish and install in the treads of stairsfrom Cafeteria up, from Coop. storage (#1) to Coop (5l),from smoking oom (/,2O) to Terrace, and the two stairs fromMezzanine floor to attic snace includin the six treads ineast wing, "Mason" safety t:eads 4" wide steel base 5 ribs fullleight of treads or equal 'aCety treads approved by the architectand safety treads shall be nc'ord into concrete as per manufact-urer specifications. Th :h for all staIrs and steps shallbe as hsreinafter specified and shown on. the dra..'ings.

1DTr.rTp,mT'rQ t-"r' Ir'(LLUtJ.L . Li.

- Build all exterior terrace walls areas, nlatforms,and buttersses, walk, etc., all as shown on drawings. Floors ofareas and walk of terrace etc., shall be 3-" thick topped with "

of cement finIsh and they shall pitch to drain where shown.

CCTChFTE ON ROOF:

Concrete slab of roofs shall slope or shall be curbedas in dome, as shown and al concrete shall be rodded. and floatedto a smooth and even surface true to contour ready to receiveroofing.

Build all concrete curbs for skylights etc., as shownfurnish and install 1"X8" anchor bolts in all curbs, bolts tob spaced not over 3'-O" apart.

CEENT FINISH (for Floors, Pavement Stairs, Stens etc.,)

All cement finish, where specified, or called or onplans, s'all he cement mortar as follows;

One (1) part Portland Cement an' one and one-half lparts coarso, Clean Columbia hivér concrete sand, which hasbeen screened throuh a #6 sieve.

The sand and cement shall be rslxed together dry untilan even color results, shoveling and raking while mixing. ratersbou1 then be added,care being taken to bring t}'e resulting-.:ortar up to the proper consistency for using.

- "Lstormix" shall he added to the gauging water in theproportion of one gallon of Mastrmix for every barrel of cementused. The Logglas floor3shall be divided in panojs with bordersof different color add Colormix to coient finish as directed byte architect and as per maiufacturer's specifications.

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22.

The cement finish for floors steps aiid stairs shall benot less than three-quarters (3/4) of an inch in thickness,laid in one operation. All coating to be thoroughly floatedwith a wooden float and troweled with a steel trowel at theproper time when the mortar is in prime condition for thisoperation. Any coatings which have been hard set before beingthoroughly floated and troweled shall be re:oved by chipping andreplaced wtth freshly mixed mortar. No neat cement should besprinkled on top of finish.

The topping shall be laid Immediately after the placingof t-e concrete, in such place as ground floor, areas, walks etc.,so as to unite with it, forming a solid body, and any loose ordamaged coating shall be made good by t'is contractor.

This cement finishshown or directed and. the jonarrow, shallow "V" section.blocks square. In finishingwhere a NV" joint occurs.

shall be divided into blocks wheretnts at tTe top being finished to aAll lines to be straight anda section of topping, stop same

Immediately after laying, all finish shall be protectedin a satisfactory manner so as to avoid any possible damage tosame.

The finish for Loggias floor shall be laid on a concretebase mixed as hereinbefore specified, one an one-haif (li-") incht1.ick laid on top of te membrane viater-proofi.ng.

The finish for all roof slb except dome shall consistof a heavy coat of grouting mixed in the proportin of 1 partcement and three parts concreteRW sand 1-3 and apply Immediatlyafter concrete is poured and rodod and floated to an even truesurface.

The finish on Dome slab shall be concrete mixed ashereir4befor specified, two 2" thick laid over to membranewater proofing and roded and floated to a true curved surfaceas shqwn. The concrete s'rali ho mixed to a proper consistancyto faI,1it.ate laying.

The following rooms and stairs shall be finished withcemen finish as bereabove specified.

GROITND FLOOR

The entire surface of Ground floor including fan room,trans ormer room, etc., all areas, entries, etc., but ecoptingball oom and stage, concourse L19, men's room 8 sioking room2O, art of cafet'ria room 27 as shown, the toilet rooms and

showe room, and Soda fontain room 21

hLZZAh EF FLOOR

Th entire surface of floor excepting toilet room andentrace vestibule.

FIFST FLOOR

The entire surface of floor excepting Lounge room :'133and all toilet rooms.

SECOND FLOOR

Entire surface of floor excepting all toilet rooms.

STAIRS AND STEPS

All Stairs and steps interior and exterior includinglandings, throughout bui2in 'ind,terraces excepting exterior andinterior main entrance steps, 3tairs and vestibule shown to befinished with stone and the two stairs from concourse l9 tomezzanine floor, which shall be finished with wood.

PTp.JATION OF CONCRETE FOR CEMENT FINISH:

Mherever it is imnossible to apply the cement finishat the time the concrete is formed (in such places as stairs,reinforced slabs etc.,) before laying topping, the surfaces of theconcrete shall be cleaned of all its "laitance" or scum bycleaning the surface with wire brushes and dilpted muriaticacid well rinsed off. If surface of concrete s too smooth,roughen with hammer to provide a key for the cement finish. Onall sot concrete surface ti:.at is to be finsihed with 3/4"topping apply one bonding coat of Mastermix in accordancewith anufacturer directions.

ALTOVJA:tTC FOE TTTICYThSS OF FL.JTRR:

In all dimens±ons given or shown on rians, tis contractorwill make proper allowance for finishing of surfaces as shown.

TI'S AFToT C--'4 , 41

V,,-

Furni3h and install Dovetail anchor Slot spaced, notoverl6 apart, in all concrete surfaces of exterior walls,columns, piers, lintels, beams, etc., shown to be finished withbrick or stone including the interior concrete surfaces sho;nto be f'J.rred with files.

Furnish and install --"x 6" bolts in top ofcurb ofskylights same to be spaced not over 3t_Q apart.

Furnish and install inetc., or wherever necessary, lOof metal lath suspended, coiling.not Over 30" on centers they shament wherever 'Tossible and shallshown and directed.

concrete slabs of floors, roof,wire hangers to suspend. furringThese hangors shall be spaced

11 be hooked over steel reinforce-be of proper lenghts all as

Build in all anchois, bolts, ties, nailing blocks,etc., as directed , that is shown or that is required by anyother trades. Iron workers, plumbers, electricians, heatingmen arid. other mechanics, will set in :2lace before this contractoris ready for concreting sleeves and conduits around which t'iscontractor shall concrete without distrubing same. Install"Full-dog" anchors for floor sleepers and metal roof nailingstrips.

CAUTION:

This contractor shall be responsible for any extrawork or materi.l that may become necessary on account of hiswork being crooked, or not true to lines or dimens±ons givenor shown, and he shall bear all extra expense caused to plaster-ing contractor or any other trade in remedying his work.

24.

CLJTPTG:

After completion of his vork or when so directed this

contractor shall remov

all 1is apparatus scaffolding etc.,

and remove from premises all debris pertaini

to his work.