ML19309A397

Provides Info on Making Cadweld Splices & Forwards Erico Products Literature on Plastic Packaging & Rebar Splicing

ML19309A397
Person / Time
Site:	Rancho Seco
Issue date:	11/03/1969
From:	Crews J US ATOMIC ENERGY COMMISSION (AEC)
To:	Flora J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML17198A048	List: ML19309A376 ML19309A383 ML19309A387 ML19309A388 ML19309A391 ML19309A397
References
NUDOCS 8003270846
Download: ML19309A397 (16)

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UNITED STATES 17( '.'h.

ATOMIC ENERGY COMMISSION j

DIVISION OF COMPLIANCE 4

Q 'g REGION V

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p U81 s till DANCROFT WAY BERKELEY. CALIFORNIA 94704 Taa-se sai-sist Exv.est November 3, 1969 John W. Flora, Senior Reactor Inspector Region IV, Division of Compliance CADWELD SPLICES, INFORMATION ON

References:

Memo, J. W. Flora to J. P. O'Reilly, " Concrete and Reinforcement Placement at Cooper Station",

dated 3/11/69; Memo J. W. Flora to J. P. O'Reilly,

" Possibility of a General Problem with Cadwelds",

dated 10/9/69; Memo, J. W. Flora to J. P. O'Reilly, "A General Problem with Cadwelds", dated 10/28/69 Listed below and by attachment is information which I collected during an inspection with Mr. Dodds at the Rancho Seco Nuclear Station construction site on October 21-22, 1969. At the time of the inspection we witnessed k

the making of the initial production Cadweld splices, and discussion was held with Mr. Kenneth Peters, a representative of the Pacific Utilities Supply Company, San Francisco.

Mr. Peters was at the site to provide tech-nical assistance and training to the welding operators. He had previously participated in the qualification of Cadweld operators for the project.

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The following information was obtained:

J 1.

Packaging of Powder Attachments 1 and 2 describe a new plastic packaging method, and provide instructions on the use and care of Cadweld powder. Copies of these instructions were observed in each box of material in the work area.

I had not seen the powder material packaged in plastic bags before, and inquired of Mr. Peters about it.

He said this packaging method was

" ten times better" than the previous use of cardboard (aluminum lined) conta iners. Of principal concern, according to Mr. Peters, was the sensitivity to moisture pickup by the cardboard containers. He estimatei the shelf life of the powder packaged in plastic bags in a dry storage area to be approximately five years. He estimated the shelf life, under similar storage conditions, for the material in cardboard containers to' be approximately two to three years.

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. John W. Flora November 3, 1969 The plastic packaging is more susceptible to puncture in the work area (see attachment 1).

Mr 2.

Bar End Spacing or Cap Mr. Peters emphasized the use of 3/16" square stock spacers (see attach-ment 3, reverse side) in maintaining the proper spacing between bar ends within the sleeve. In response to my questions, Mr. Peters said he was unaware of a general or specific problem involving " burn-through" of the Cadweld sleeves during the welding process.

Mr. Peters did say that use of the spacer (now provided with each splice kit) is particularly important where the bar ends are square cut. He also stated that the p 1sibility of burn-through would appear greater i

when transition sleeven were used in joining bars of unequal size.

The use of the 3/.16' spacer is discussed in ERICO Products' instructions for both horizontal and vertical splices (attachments 4 and 5). Their-use is not covered, however, in the ERICO instruction " Inspection of i

the Cadweld Rebar Splice" (attachment 6).

1 3.

Dating of ERICO Products Literature In response to my question, Mr. Peters said that the last three or four digits of the ERICO form number show the month and year of publication.

Thus, the literature on plastic packaging was published in February and April of this year. The rebar splicing instructions, of which pages 29 through 34 are attached, were published in their present form in January, 1969.

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evs teactor Inspector Attachments:

As stated above cc:

G. S. Spencer, w/o attachments i

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KEEP PLASTIC BAGS WELL COVERED TO 3REVENT SPA El FRO VI CUT-INIG TORC:., WELD.iN G OR REACTION

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Instructions for Vertical Splicing

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Instructions for Horizontal Splicing

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Cartridges must be stored in a dry place and handled with care to avoid f

puncturing.

1 Just prior to use. powder must be i

remixed. Use care not to spill any pow.

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Rsfer to section 7 of the " Instructions for Splicing" for crucible preparation and starting powder procedure.

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1. Cut off top of bag with side cutters

2. Open bag and then reclose so as 2ttiti l:te mu3p just below closure. Allow enough to entrap air in the bag (starting

':8WW30130tf lifKitel3fl!!:lb remaining bag length to permit powder cartridge may be removed remixing.

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4. Using both hands. flip flop bag so

5. Reopen bag and pour a small and grasp firmly, as to agitate powder and obtain a amount of powder into the pre-uniform remixing.

pared crucible to check that the steel disk is properly seated.

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.-43AR SP1.2CONG lNSTRUCT ONS IO CA23 OF SPLICE SLEEV2S, CA272LDG3S & EQUIPMENT

1. Cartridges, sleeves, asbestos wicking and ceramic in.

4. All graphite parts (except crucible covers) must be serts must be stored in a dry place, if outer cartons are cleane,d before reusing. Clean with whisk broom, rag, soaked, remove and dry contents thoroughly, coarse brush or rolled up newspaper. DO NOT use wire

2. Splice sleeves are wrapped in a special rust inhibiting paper. Do not unwrap sleeve untin ready to use in joining procedure. Do not leave unwrapped sleeves in position NOTE A: If a splice sleeve must be unwrapped and left in where they may rust.(See Note A.)

position overnight, protect as well as possible to prevent dew, frost, rain, snow or any direct moisture from getting

3. Graphite pouring basins and crucibles must be thor.

Inside the splice sleeve. Sleeve must be heated with oughly dried before use. Heat with torch or on a stove to oxy.atetylene torch to assure it is completely dry. If above 212*F. Test by putting a drop of water on graphite sleeves must be exposed for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, reli.

-it should boil off rapidly. If stored for several hours, ab:e corrosion protection is necessary. Contact factory repeat heating before use, f sr more information.

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Ends of rebar must be dry and free of rust, loose mill 2.2.2. Heat bar end to assure complete dryness, scale, dirt, ; aint. concrete, etc. Clean back from bar end 2 inches beyond where end of sleeve will be

3. Badly deformed bar ends may require cutting to assure located. (Clean distance equals one. half sleeve easy fit of the sleeve. Bar end shear " drags" may be length plus 2 inches.)

flame cut or ground off. Oversize longitudinal ribs should be ground down as flame cutting may damage the bar, 2.

Cl.EANING SEQUENCE especially on higher strength steels.

2.1.

Torch and power brushing (See Note A)

4. Cleaned bar ends which must be left out overnight should be protected (use empty cartridge cans) and 2.L1. Heat bar ends with oxy. acetylene torch to dry must be reheated tu drive off moisture, completely and/or burn away any other foreign matter. Flame should be soot free and not NOTES:

leave any residue or deposits on bar end.(See A. Use of a hand wire brush is not recommended. lf lack of Note B) power prevents use of powerdriven equipment,then use double cleaning as noted in 2.1.3. would be required as 2.1.2. Remove all loose mill scale, rust, etc. with a well as wiping with a clean, dry rag to remove any dust high speed power wire brush, (1000 RPM or clinging after hand brushing.

(higher). See Note C)

8. A " rose. bud" heating torch tip is recommended. Bar 2.1.3. Repeat steps 2.1.1. and 2.1.2. on extremely should be heated to 200 300*F. to insure dryness.

bad bar surfaces.

C. Power brush must be kept free of grease, oil or other 2.2.

Torch and Sandblasting contaminants which could evolve gas and cause filler f

metal porosity. This would also apply to hand brush

{mj 2.2.1. Sandblast bar end clean, equipment in Note A., above.

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Part -.;t. ion Number Lbs.

Part Demps,on Number Lbs.

it P00Rl'.3 3 SIN FRAME, Vertical RBM-2660 3.7 END ALIGNMENT FlillNGS 9-110 Transiban RBM-2767100 &

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Horizontal RBW-167 4.0 RBM-2750-75 2.1 Replace eat Locking Wing Nut (Horiz.)

RBW 167-3A

.2 fl0-fil RBM-2750-125 &

2.1 Wire Handle RBS-3666-A 3 75 RBM-2667-85 2.8 f.

Chain With Stud RBS-3157 3

111 - 114 RBM-2687125 &

2.8 i y. ;.

Chain Only RBS-3157-3

.4 RBM-2669-75 2.8 R:

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fil-fis RBM-2759-K &

4.5 Chain Stud RBS-31571

.I RBM-267150 4.5 t

Chain Master Link RBS-3157-2 114 - 118 RBM-2678-85 &

4.5 A

Chain Thumb Nut RBS-3157-A

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CRUCIELE FRAME,4" Diameter 4

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RBW-164-6 7.'6 Locking Screw RBS 3232

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Locking Screw Swivel Pia RBM-2102-5 Guide Pia RBS-679-1 7

RBW 164-7 83 CRUCIELE FRAME-With Chain 6" Diameter RBW-164 6C 8.6 BOTIOM SUPPORT CLAMP 17 Thru111 RBM-2972 23 iD (SeeN:'s1) 7" RBW 164 7C 9.3 fil

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Replacement Parts, T Bar RBM 2972-7A

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Repfa:erant Wire Handle RBS-3666-8

.5 Thumb Screw RBM 2972-8

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LockingLatch Assembly RBS-2715-1B

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'H (See N.:t 1) Complete Chain & Bracket Assembly RBS-3157-C 1.0 HOR 120NTA1 PACKING CLAMP i6 ThruiS RBW-il7-D 4.4 i

Chain With Stud RBS-3157

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Chain Only RBS 3157 3

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't Chain Stud RBS 31571

.I (18 RBW-!!7-C 5.0 CL Replacement Hand Knob RBW Il7-3

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Chain Master Link RBS-3157-2 CRUCIBLE COVER 4" Diameter RBS-4383 4 1.25 Chain Thumb Nut RBS-3157-A

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5" RBS-4333-5 1.75

'a Chain Brackets RBS-3157-B

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RBS-4333 6 2.75 END AL:3WENT FITTINGS f6 RBM-2974-100 7"

RBS-4383-7 3.25

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17 RBM-2870100 2.3 CRUCIBLE EXTENSION 4" Diameter RBS 3687-4 1.5 N

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1. 8 RBM-2886-100-ll2 2.4 5"

RSS 3687-5 1.8 19 RBM-2748100 23 6"

RBS-3637 6 2.5 g

7" RBS-3687 7 3.0 m

110 RBM-2750-75125 2.1 (Jy fil RBM-2667-85 2.8 DISKS RBS-3005-0 4

SPACER KEYS 1"(19 & Smaller)(9/pkg)

RBS 3527 A

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GU!DE TUBES %"(111 & Smaller)(25/pkg)

RBS-641-A

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RBS-465-A

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23 RBM-2886-100 23 CERAMIC INSERIS %"(fil & Smaller)(20/pkg)

RBS-3690

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RBM 2743-100 2.4 FLINT CUN RB 20177 3

' 5 glacement Ihnt RB-20177 A fl0TE. I c : i a:sembly can t,e attached to crucible fracnes R8W-164-6 (6" diameter) and

Ell.E BRUSH RB-26167 3

Fi A-li4 7 (7" diameter)if desired for use on horizontal spliccs.

ASBESTOS PACKING (If Ball)

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1. Clean rebar ends as per "Rebar Cleaning Procedure."

2. Place a double wrap asbestos pack-Position Bottom Support Clamp an6 End Alignment Fitting so end of rebar ing into position in the lower End will be at Guide Tube opening. (This can be achit./ed by making a gage as Alignment Fitting.

Indicated on the photo.This gage will always be somewhat shorter than half Pack tightly with a blunt screw the length of the Sleeve.) Take extra precautions on positioning these pieces driver to seal between rebar sur-of equipment when making Trans. tion Splicos, if the larger bar is not far face and Fittinh.Take care to Cetthe enough into the Sleeve it will give a low fill.

packing material up close to the s

T "T" shaped Support Rod on Bottom Support Clamp should be lined up with rebarand not on the mating surface

(] tap hole so that support will be directly under Pouring Basin.

in the Alignment Fitting where the Sleeve will seat.

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3. Place Splice Sleeve into lower Fit.

4. Place single wrap of asbestos wick-5.With handles unlocked, Pouring ting and seat firmly against the ing loosely around bar on top of Basin slightly open, place Pouring asbestos packing to seallower edge Sleeve, DO NOT PACK. Place End Basin around the Guide Tube and of Sleeve.When lowering top rebar Alignment Fitting on top of Splice Ceramic insert against Sleeve.

into Sleeve gap %" to b* with a Steeve and place Guide Tube in tap Close Handle Clamp and lock. Place nail, wire or rebar spacers supplied hole and position Ceramic Insert chain around Sleeve and tighten in envelope with CADWELD steel on Guide Tube.

thumb nut. Be sure to support disks.

Pouring Basin while securing chain, so as notto upset position of Sleeve.

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6. Adjust Pouring Basin support rod

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SEE SEPARATE INSTRUCTION SHEET FOR BAG TYPE CARTRIDGES

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7. Preparation and filling of Crucible.

A Crucible should not be reused until allowed to cool for 15 i

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Clean Crucible thoroughly inside and on mating surfaces.

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Close Crucibles and lock Crucible Latch.

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Place steel disk over tap hole. Check for proper seating. Before l ?,

opening powder cartridge turn cartridges end over end a few M [f times to mix powder. Pour in CADWELD powder. (if extra filler

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tainer. Recover this while pouring powder into Crucible.

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small amount of starting powder to place on the inside upper lip i

of Crucible Extension.

- ildl Place Crucible in position on Pouring Basin.

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Basin. Make sure mating surfaces are clean.

A steel Crucible Extension is provided. Place on top of the C -7 graphite Crucible and place the remaining amount of starting

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powder on upper inside lip of Crucible Extension. Place ccver on id(!

Crucible Extension and ignite starting powder w!th teint gun.

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O (When firing stand up wind from the Crucible if possiole.)

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soft or plastic. This will prolong yj'*N* {.

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Clean slag from Crucible and i

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to promote cooling. Cover and L

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cleaned every time. Use a whisk N,(:j broom or rag or the flat side of a l

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Clean flash ordebris from all mating

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1. Clean tebar ends as per "Rebar Cleaning Procedure."

2. Position Sleeve with tap hole directly over gap between Silp Splice Sleeve onto bar before placing rebars in bar ends.

position for joining.

Sleeve must be " lifted" to allow more filler metal Butt ends of rebar if shear or flame cut.These ends will clearance above rebar than below. (Sleeve need aot be form a " natural" gap when butted. if gap is over %' at concentric with rebar.)

widest point trim or rotate bars to reduce gap.

Larger sized Sleevas have screws or pins to accomplish Saw cut bar ends are gapped Mo' to %'. Use spacer

" lifting". Smaller sized Sleeves are " lifted" by tucking supplied as " gapping gage" by butting saw cut ends a doubled end or knot of asbestos packing under the against spacer. Spaceris ief t in position between saw cut upper Sleeve edge. This also secures packing. Do not bar ends while completing joint. -

force packing into Sleeve except at point of " lifting".

If bar ends are badly bent. " lift" completely to push bar against bottom of Sleeve.

Wrap asbestos packing (2 turns) around rebar and O

against end of Sleeve. If packing is completeiv un.

raveled, retwist while placing around Sleeve ends. Do Not force packing into Sleeve.

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3. Place End Alignment Fittings onto rebars, lock and

4. Place Horizontal Packing Clamp in position, (normally slide into position against packing and Sleeve. Be sure it will hang from rebar.)

that End Fittings slide over the end of the Sleeve.

Tighten hand knob on end of PackingClamp to squeeze the End Fittings towards the Sleeve. This wedges the packing securely against the Sleeve and rebar to prevent leakage.

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5. Place Guide Tub'e in tap hole and position Ceramic insert

6. Seat Pouring Basin in position on top of Sleeve. Pouring around Guide Tube.

Basin is secured by using the chain on the Pouring Basin j

If necessary, turn Sleeve so that Guide Tube is vertical.

Frame around the bottom of the Sleeve.

Loosen Packing Clamp slightly if necessary and retighton.

Do not over tighten nut on chain. Finger tighten only to keep assembly from tipping.

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FOR BAG TYPE CARTRIDGES

7. Preparation and filling of Crucible.

A Crucible shou ld not be reused until allowed to cool for 15

---

q~~ ~~ ~ TZ minutes or more. If more frequent firing is desired, several com-

'5.

~dJrgI M plete Crucibles with Frames should be used alternately to allow cooling time.

Clean Crucible thoroughly inside and on msting surfaces, i..,.........'7' l-(

Close Crucibles and lock Crucible Latch.

Place steel disk over tap hole. Check for proper seating. Before l

1 opening powder certridge turn cartridges end over end a faw times to mix powdtr. Pour in CADWELD powder. (if extra filler cartridges are needed, as on Transition Splices add these.)

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NOTE: Starting powder cartridge is packed inside powder con.

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tainer. Recover this while pouring powder into Crucible.

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Level filler material.

DO NOT TAMP.

Spread starting powder evenly over filler materia. Keep a small amount of starting powder to place on the inside upperlip g,,

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Place Crucible in pr'sition on Pouring Basin.

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a... 4,, - hQ;3 Note that parts " key" when Crucible is positioned on Pouring 1-Basin. Make sure matir'g surfaces are clean.

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A steel Crucible Extension is provided. Place on top of the 7

grsphite Crucible and place the remaining amount of starting j

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,,,g powdor on upper insido lip of Cruciblo Extonsion. Placo cover on Crucibio Extonsion nnd ignito starting powdor with flint cun.

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fired at starting powder on Crucible Extension upper edge.

."1 (When firing stznd up wind from the Crucible if possible.)

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if Crucible Frame has chain, place around Sleeve and tighten.

Tighten only finger tight, do not use pliers to over tighten.

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8. Allow at least one minute for CADWELD filler metal to

9. Breakoff riserwithoneortwosharp blowswitha hammer.

solidif>.

Clean slag from Crucible and Pouring Basin as soon as

" Crack" the Crucible Frame slightly open (%') while possible to promote cooling. Cover and Crucible Exten-slig is still soft or plastic. This will prolong Crucible life, sion need not be cleaned everytime. Use a whisk broom or Lift slag with Crucible after slag has solidified. Remove rag or the flat side of a screw driver for cleaning. Note:

til parts and packing. Remove graphite parts carefully Clean flash or debris from all mating surfaces as this to avoid breakage, causes springing of equipment clamps and hinges.

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1. Equipment is positioned so that the center of the sleeve is located at the ends of the re-inforcing bars.

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2. The exothermic reaction of the CADWELD powder takes place in the graphite crucible.

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(' uh an" The resultant CADWELD filler metal flows

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between the sleeve and the reinforcing bars.

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3. The CADWELD filler metal locks or keys the h

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sleeve (through the internal grooves) to the reinforcing bars (through :hn clofmmations).

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NOTE: Packing material is i :. n gap between the ends of tne s eeve and the s

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reinforcing bars. A Fis" steel spacer is used between both ends.

4. When the reinforcing bars are in 'compres-sion, the load is transferred through the layer of CADWELD metal that fills the spaco be-twoon tho onlis of tho luirs.

6. Whon tho loinforcing bars aro in tension, the CADWELD motal is in shcar and stress transfers from the doformations on the end of i

one bar to the internally grooved splice

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ATTActiMitNT #6 i

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INSPECTIO N

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Properly made splices will have filler metal Bulging of wicking is most pronounced at visible at both ends of the sleeve and at the points which must be sealed to prevent. filler tap hole in the center of the sleeve.

meta! leakage. These points are the botto'm of i

Filler metal will not flow to the very edge of the vertical splice and both ends of the l

the sleeve due to the gasket action of the horizontal splice. The bulge is usually %" to j

sbestos wicking as illustrated in the line

%" deep and sometimes %" to %" at the drawing below.

point where the loose end of the wicking has been forced;inside the sleeve.

FILLER METAL REGAR SPLICC W

SPLICE SLEEV g'

SLEEVE \\

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NOTE: Wicking should not be forced into sleeve at time of pack-ing. The wicking will, however, be pushed in as described, by the horizontal packing clamp or the weight i

of the equipment on vertical splices.

i Since packing at the top of the vertical splice is not as critical as at other points, the fillor metal ofton flows up beyond the top of the sleeve through the loose upper packing.

ECCENTRICITY AND If the splice sleeve is filled with sound metal, eccen-COCKING OF REBARS tricity and cocking of rebars within the sleeve will have no effect on splice performance, b

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V(] REJECTION OF A SPLECE AND !?S CAUSES:

IMPR OPF.R FILL (Metalnot visible at ends of sleeve-See 'Yoid I.imits")

1. Filler'metalleaking out due to faulty pack-

5. Packing has been forced into the sleeve ing of the asbestos wicking, or misalign-beyond the limits as listed above.

ment of equipment.

6. If rebars are not clean and dry, gas will be

2. Excessive gap between the ends of the generated by the heat of the molten filler rebars. (Requires more filler metal to fill metal. This gas can cause a blowout of this extra space),

metal past the asbestos packing and produce voids.

3. Use of a smaller cartridge than called for, or use of only part of the correct cartridge

7. Sound splices often have ' pin holes and due to spillage when loading.

shrinliage fissures resulting from the con-traction of the filler metal on cooling.

4. Undersizo rebar requiring more filler metal These are usually visible at the top of a to completely fill the sleeve. (Check latest column splice, and are not cause for ASTM specifications.)

rejection.

SLAG AT TAP HOLE C.

' Filler metal leaking out due to faulty packing mediately and discolor. If there is any doubt v'of the asbestos packing or misalignmont of the as to whether solid filler metal or slap is equipment.

present in the tap hole, use a coarse fi's or NOTE: When checking for solid metal of the prick punch to test. Breaking off the riser may sleeve tap hole, you cannot rely on color pull metal out of the sleeve tap hole. This alone. When a hot riser is broken off, the should not be construed as an unfilled tap exposed filler meta! will oxidize almost im-hole and is not cause for rejection.

BLOWOUTS INDICATE THAT THE CLEANING PRACTICE FOR REBAR ENDS SHOULD BE REVIEWED.

l'ower wim hiunhing mul tnrch drying (an sloovon and othor aquipmont boin0 damp.

calloil lor in ninnilant inntnictiona) will olimi.

This mont commonly occurs whon material is loft out overni ht or in the rain. (Sco instruc-nato tho blowouts and sovoro voids.

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tion shoot soctioa " Care of Splice Sleeves, Blowouts also can bo caused by splico Cartridges & Equipment.")

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VO;D LIMITS plices shat'. not be rejected where voids of filler metal do not exceed the area listed below, when easured as shown in figure below:

O S;gh Splice Cat. No.

Allowable Void Area-Squaro inches Vertical r~uit Standard Splices @@

C yumference 1.ow@

/6 RBT 6101' H) 1.05

/ 6/7 RBT6 7101( H) 1.05/1.03

%/Me NOTES:

/7 RBT-7101( H) 1.03

%s

@ Allowable void per end is 7 7/8 RBT7 8101( H) 1.03/1.02

%s/ %

g, ggggg y8 R BT 891( H) 1.02 ends. For example, a splice f 8/9 RBT8 9101( H) 1.02/1.02

%/%

of #18 bar in RBT-1891 79 RBC 976( H)

.60 would be acceptible with a RBT 9101( H) 1.02 1 %" wide,1 %" deep void in f 9/10 RBC91076( H)

.60/.61

%/Ms RBT910101( H) 1.02/LO3

% / Ms M e. %

ama 4 %

~

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/10 RBC 1076( H)

.61

%s inches.)

R BT 1091( H) 1.03 M r.

f10/11 RBC101176( H)

.61/1.03

%s/ Ms J

RBT1011101( H) 1.03/1.53 Ms/%s O Th.is column for all stan-fil RBC 1176( H) 1.03

%s RBT 11101( H) 1.53

%s zontal, horizontal side fill,

1. 11/14 RBC11 1476( H) 1.03/1.24 Ms/ %

angled splicos and B-series i

RBT11 14101( H) 1.53/1.52

%s / %

Structure Splices.

111/18 RBC11 1876( H) 1.53/1.70

%s/ Me RBT11 18101( H) 1.53/1.99

%s / %

O This table to be used for 714 RBC 1461( H) 1.24 Ms vertical splices only with low RBC 1476( H) 1.52 filler metal around entire cir-

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RBT 1476( H) 2.15 cumference. For spot voids, n

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R BT 14101( H) 2.15 Q'

f14/18 RBC141876( H) 1.52/1.70

%/Ms

'j

. RBT1418101( H) 2.15/1.99

%/%

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1. 18 RBC 1861( H) 1.99

)

R BC 1876( H) 2.64 Ma il RBT 1876( H) 2.6 +

Me RBT 1891( H) 3.00 RBT 18101( H) 3.00 M' (Normal void due to i

asbestos packing.)

NOTE: Void dimensions can be established by use of a C

probe of tie wire-n c[-l*?.b-a,hy,m~,,

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1 Void Area =W (D-M6)

-D-VOID LIMITS-C-16 SERIES,

SUMMARY

COMPRESSION ONLY The inspection of a CADWELD robar splico is visual.

SPLICES occasionaichocking of thoworkmanshipof thospiic.

ompression only splices shall not be rejected where ing crows to mako suro that thoy aro following tho correct

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olid filler metal is in evidence at the splice sleeve tap splicing proceduros will sorvo to reinforco tho j,udgmont i

hole, and voids are no deeper than 1 inch, either as of the inspoctor on tho job. Erico standard instructions spot voids or full circumferential low fill.

should be consulted for additionalinformation.

a.m,

ennima in u.n.A.

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