Document Gm03V2ZO106a3GKgne8O4p4Dx

FILE NAME: Trade Publications (TR) DATE: 1951 Dec DOC#: TR053 DOCUMENT DESCRIPTION: Trade Journal Article - Silica Producers Talk Shop DECEMBER, 1951 Bror Nordberg M itef it OCR P hODI/CTS THE INDUSTRY'S RECOGNIZED AUTHORITY # VOL. 54, No. 12 Nathan C. Rockwood editorial Consultant This Month We Hear 67 Editorial--A Calf to Action for Agricultural Lime* stone Producers 75 Rocky's Notes --Surface Chemistry of Aggregates 77 Labor Relations Trends 79 V The-Personal Side of the News 81 hukisfry News 85 Hints and Helps 88 New Machinery 90 Spiral Concentrators for Gravity Separation of Minerals 92 Electric separators and magnetic equipment also used by Humphreys Gold Corp. in processing beach sand deposits to recover ilmenite and zircon W a lte r B. le n h a r t Producing Vermiculite Aggregate 96 Evaluation and development of Kiln Efficiencies 99 Part 1% . Evaluating radiation loss in rotary kilns Victor J. Azbe Kentucky Crashed Stone Industry Expands 102 New plants built by Kentucky Stone Co., Reed Crushed Stone Co., and Rogers & Brunnhoeffer to supply expanding market W a lte r B. le n h a r t Five Quarries Serve Portable Plant 105 Sand Mortar Strengths Influenced Most by Grading 106 . L. Howard "Doubie-Obty" Storage piles 109 Removing Debris from Sand and Gravel 110 Concrete Materials Co., Des Moines, Iowa, uses centrifugal debris separator and r-designs for belt conveyor transportation Silica Producers Talk Shop 112 N.I.S.A. considers freight rates, percentage depletion, industrial health, and federal controls Standardization of Potassium Dichromate Solutions 116 Oscar D. Gvtr Portable Plant increases Output 117 Control of Tailings from Washing Plants 118 Part VIII. Tailing line kept outside berm at Iron King mine of Shattuck Denn Mining Corp. W a lte r B. le n h a r t Mining Congress Features Beneficiation, Drilling and Grinding 122 Masonry Producers Look for Record Year 155 Producers express optimism for 1952 at N.C.M.A. New Orleans meeting Ready-Mixed Concrete for Chicago Area 159 Imperiai Redy-Mix Concrete Co. has carefully engi neered plant. New truck mixer designed to meet highway load limitations t. D avid Minsk A.C.I. Stresses Quality Concrete 163 Drain Tile Manufacturers Meet 168 index --Vok 54 195 2 ROCK PRODUCTS, December, 1951 W olter B. Lenhart, Associate Editor l . David Minsk, Associate Editor Robert I. W ilde, Associate Editor M. K. Smith, Assistant Editor I . M. Am ocher, Assistant Editor M. A. Christiansen, Assistant Editor Contributing editors Victor J. A zbe Dr. f. O . Anderegg M. W. lovin g James A. Barr, Jr. Home Office E. R. Gouley, Manager M ary A. W halen, Subscription Dir. M. Z, Poplett, Dir. of Research C. M. Hancock, Production Manager C. P. Teats, Field Representative District Offices Eastern A rea--Morgan K. Cottingham, Manager; Raymond E. Keine, Assistant, 522 Fifth Ave., New York 18, Tel. Murray Hill 2-7888. Central Area-- R. P. Keine, Manager, Hanna Bldg., Cleveland 15, Tel. Main 1-4362. Midwest Area-- E. H. Hickey, Rep resentative, 309 W. Jackson Blvd., Chicago 6, Tel. Harrison 7-7890. W estern Area-- L. C. Thaon, Man ager, 309 West Jackson Blvd., Chi cago 6, Tel. Harrison 7-7890. Pacific A rea-- Duncan Scott & Co., Mills Bldg., San Francisco 4, Tel. Garfield 1-7960. In Los Angeles 6, 2978 Wilshire Blvd., Tel. Dunkirk 8-4151. London, England--Harold F. Charles, Managing Director, Maclean-Hunter, Ltd., Wellington House, 125 Strand, London, W.C. 2. ROCK PRODUCTS is published monthly J g MACLEAN-HUNTER Publishing Corporation. 309 W tst Jackson Bird., Chicago 6, Illinois,' Horace_[ Honter, President; E. R. 6auley, Vice President, Ralph K. Davis, Secretary. Copyright, W p l- j** tered as second-class m atter, Jan. 3D, Is ? . * , Chicago, IH. post office under the act pr Mar. A 1879. Additional entry at Milwaukee, W u. ROCK PRODUCTS is Indexed regularly by EWJpeering index, Inc. and the Industrial A rts inoex. SUBSCRIPTION INFORMATION Subscription Price: United States a n d P o g e r w a Canada one year, 5 2 .0 0 ; two years, 5 3 .0 ! TM '" years, 54.00. Pan American, one year, W w J " years, 5 7 .0 0 ; three years, 510.00. All p g e eign, one year, $ 6.00; two years, 512-50; years, 515.00. Twenty-live cents for single I Canadian subscriptions and remittances may M in Canadian funds to ROCK PRODUCT*, " * Box 100, Terminal " A," Toronto, CanadaTp Subscribers-- Date on wrapper In d ic a tt ! * with which your subscription a p i r t s . . I* w r , Z to have address changed, give old as well as address. S ilic a SILICA PRODUCERS TALK SHOP N.I.S.A. considers freight rates, percentage depletion, industrial health, and federal controls at fall meeting M ore t and han one wives w hundred m ere present em at bers the successful semi-annual m eeting of the National Industrial Sand Association held October 17-19 a t The G reenbrier, W hite Sulphur Springs, W. Va. Meetings were scheduled fo r th e three mornings and the afternoons were left open for golf tournam ents and other recreation. According to custom, the discussions were informal and of a round-table nature and there were no prepared papers. Subjects included traffic m at ters, engineering problems, car sup ply, price and wage controls, priority and allocation controls and indus trial health legislation. President Sterling N. Farm er was presiding officer fo r th e first session which began w ith presentation of the financial report and adoption of a budget fo r 1952. Freight Rotes Em ery M. D urstine, chairm an of the traffic committee, followed with his rep o rt and then W illiam W. Col lin, Jr., association counsel, comment ed on curren t traffic m a tte rs. M r. Col lin spoke briefly on the bonded sand case, the box car case and the freight ra te increase under Ex P a rte 175. The bonded sand case resulted in a re duction of 50 cents p er ton from the existing freight rate, and the freez ing of the differential r a te as it had existed between bonded sand and other sands. The box car ease has an im portant bearing on consum ers, and m an u fac tu rers of flat glass and containers joined th e producer's of sand in p re senting a case before the I.C.C. for adjustm ent. The case was tried in March, the brief was completed in July and the report of the examiner is due. Considerable confusion has existed as to rate s th a t apply, and Mr. Collin cited cases w here, because the tariff for sand as published was less than the carriers intended, the car riers had sued receivers for the dif ference and recovered. S hippers, on the other hand, have sued the carriers for refunds. The Ex P a rte 175 freig h t raise in crease gives the carriers a 9 percent increase in the east and 6 percent for the rest of the nation and is the latest of a chain of increases in rate s g ra n t ed the railroads. This increase is of special interest, said Mr. Coliin, be cause the I.C.C. m em bers were in dis agreement in the details of the in crease and the increase w as limited to 18 m onths. T his would indicate that there is growing reluctance to grant increases and recognition th a t there is need fo r stability so as not to upset commerce by setting up differ entials th a t seriously affect competi tion. Displacement of competitive rela tionships w as em phasized in th e case before the I.C.C. opposing this new fre ig h t r a te increase. Mr. Collin m en tioned how freig h t rate increases and the abolition of the old differentials put Pittsburgh steel producers out of business in the E ast. In another in stance cited, an individual started a prepared roofing m aterial business m 1935 and bu ilt it into th e la rg e st in the United States by spotting plants in strategic locations to m eet compe tition to best advantage. His plan in cludes truck delivery and delivered price quotations. The accum ulated effect of freight rate increases has amounted to a 67 p ercen t revenue increase since 1946. In M r. Collin's opinion, th e only answ er to stopping the piling on of rate increases is political, since people expect th e trend to continue on and on as long as th e present adm inistra tion is in power. I t is ap p aren t th at the railroads are losing traffic to trucks, which Mr. Ahearn substan tiated by citing th a t 42 industrial sand producers moved approxim ately 277,000 tons of product by truck dur ing the th ird q u arter of 1951. A few years ago, truck shipments were neg ligible. Business once lost by the ra il roads to trucking is not recaptured. Discussion brought out th at mem bers of the I.C.C. are not experts but men who feel a responsibility for the solvency of the railroads; and th at the danger lies in the fact th a t in creases in fre ig h t ra te s continue to be added in small increm ents th at re sult in a considerable total. As a result, there is a tendency not to resist the increases whereas affected indus tries should go on record as to their attitude if for no other reason than an obligation to keep the I.C.C. in formed. A round-table discussion on engi neering problems was led by Stanton Left: i o bn F. P u tn a m , The N a tio n a l Silica Co., O regon, III., le ft, w a tch e r th e g o lfers te e o ft w ith E. O. Schneider, O tto w a Silica Co., O ttow a, Ml. C en ter: Jo h n R eading, C o nstruction A g g re g a te s Corg., C hicogo, III., le ft, o s c a u g h t ta lk in g shop w ith P. W. Palm er, Browntown Silica Co., B r o w n to w n , Wis. R ig h t: A rthur B Schlesinger, New Jersey Pvlver*xlno Co New York rw i* l _- SILICA L e ft: P o st p re sid en t George A, T h o rn to n , le ft, poses w ith A . N. Form er. R ig h t: Two " o ld p ro s" reody for th e te e o ff; E. M. D urstine is on the le ft, with C loude P. Helmick W alker. Mr. W alker is active on spe cial committees of the A.F.A., but reported that theie had been little committee activity affecting the in dustry during the past several years. He commented th at there is a tend ency to increased use of plastic molds, competitive with sand, in some of the m ajor industries with foundries which bear watching. The industry continues its interest in improving the packing of silica flour, and the subject came up again for much discussion. Producers are seeking an improved packing machine or improvements to incorporate in ex isting machines that will prolong the life of wearing parts and eliminate much of the dust associated with packing silica flour. Several produc ers reported their experiences with various packing machines and with special parts supplied for the more conventional machines but experience has been limited and the problem de m ands fu rth er study. P. W. Palmer of Browntown Silica Co. is perfecting a packing m achine which he believes will solve th e prob lem when an attachm ent is installed to overcome faulty feeding to the m a chine. This machine has four tubes and will fill a bag in six seconds, or a 50-ton car in 75-90 m inutes. Percentage Depletion E m ery M. D urstine presided over the second session substituting for vice-president C. M. H ardy. Jo h n T. Sapienza, counsel, discussed percen tage depletion and other provisions of th e Revenue Act of 1951. Of the three kinds of depletion, cost, discovery and percentage, Mr. Sapienza said th at percentage depletion which was granted the in d u stry in th e new tax law is preferable since it is related to gross income and not cost. The way the 5 percent allowance w orks, if a com pany receives a $1,000,000 gross income from mining, for exam ple, a $50,000 deduction is per missible but the perm issible deduction cannot exceed one-half the net income. If a producer owns or leases a de posit he is entitled to percentage de pletion b u t if he is a licensee he may or may not receive th e benefit. An in dependent contractor for excavating is not eligible for percentage deple tion. In answer to a question as to the application of percentage depletion w hen p ro p erty is leased on a ro v altv basis, it was brought out th a t both the lessor and lessee are entitled to percentage depletion. The lessor would com pute the p ercentage on the basis of the re n ta l ro y alty as gross income and th e lessee on the value of the ma terial less rentals or royalties paid. There was considerable discussion as to the m eaning of "gross income from m ining" which is the figure stated on which the permissible per centage is taken. Questions were brought up as to w hether the figure would be based on the first commer cial stage of production or be applied to the dried product or ground prod uct in com puting the income from mining and, if the value of the end product be taken, w hat about tran s portation w here th e mill is d istan t from th e deposit, etc. Also, the ques tion came up as to w hether the dollar sales volume would apply which would include the selling steps, and whether bagging steps m ight be included, etc. Inasmuch as sintering operations, and other processing steps are per missible in the case of coal in deter mining a value figure, it was sug gested that the industrial sand indus try m ight deduct 5 percent from gross sales volume and then, if necessary, argue its case with the Internal Rev enue departm ent and thus arrive at ROCK PRODUCTS, December. 1951 clarification of this issue. Mr. Sapienza then discussed the ef fects of the tax increases levied under the Revenue A ct of 1951 which apply to companies from A pril 1, 1951, and have a term ination date of M arch 31, 1954, and he also touched upon in dividual income tax increases, the pro visions governing the sales of private homes which exclude a capital gains tax if a more expensive home he p u r chased and other provisions. By now. the industry no doubt is fam iliar with the scale of increased taxes. He con cluded by saying th a t chances are good th a t th e re will be no changes to the Renegotiation Act as it affects the industrial sand industry. Industrial Health Theodore C. W aters, association counsel, presented his usual inform a tive rep o rt on th e tren d s in w orkm en's compensation and legislative develop ments affecting industrial health which are of current interest to the industry. His report covered (1) leg islative developments in w orkm en's compensation during 1951; (2) exclu siveness of remedy of workmen's com pensation sta tu te s; (3) w orkm en's compensation insurance rates: and (4) potential products liability in the sale of m aterial by producers. The re p o rt on legislative develop ments brought up-to-date his earlier report a t th e May, 1951, meeting which was given at a tim e when many of th e sta te leg islatu res w ere still in session. As of December 31, 1950, 41 states had enacted occupational dis ease compensation statutes. This year, the states of Alabama and Vermont have enacted such statutes. The Alabama statu te became effec tive Ju n e 29, 1951, and makes "occu pational pneumoconiosis" compensa ble. I t is elective as to both em ployer and employe and g ran ts either party m SILICA le ft: W ith the usuol nrckel-ahole ot stoke, Stonton W olker, left, ond Theodore W aters sto rt their golf with on argum ent on th e first tee. Right; A. N. Form er, Sond Products C orp., C leveland, Ohio, c en ter, com e to his first m e e tin g in severol years. On th e le ft is P re sid e n t Sterling Form er a n d , on th e right, Jo h n G. P u tn o m of O regon, Ilf. the right to term inate his acceptance or rejection upon 30 days' w ritte n no tice to the other side. T here is a lim itation of m onetary liability of $4750 for disability or death with monthly compensation at the rate of $200 until the full benefits of the law are a t tained. An occupational disease law enact ed by V erm ont, effective Ju ly 9, 4951, contains a schedule of compensable diseases including silicosis and asbestosis and is considered an excellent statute by Mr. W aters. A unique fea ture is th a t compensation is denied fo r p artial disability from any of th e oc cupational diseases. Included is a definition of the term "disablem ent" meaning "th at an employe is totally disabled to perform any fu rth e r work in his then occupation or in any other trade, business or occupation." Mone tary liability for disability or death from silicosis begins at $400 per month during the first month the act becomes effective and increases a t the ra te of $25 p e r month u n til a lim it of $4000 has been reached. Several bills for occupational dis ease legislation w ere introduced in Oklahoma but none w ere enacted, with the result th at employers con tinue to be subject to the hazard of common law litigation fo r th is type of in ju ry . However, O klahom a did enact a statute providing compensa tion in death cases in the am ount of $13,500, which will relieve em ployers from the continuing hazard of exces sive verdicts in death cases and also assure dependents of the compensation provided. With respect to legislative changes in occupational disease compensation laws, Mr. W aters again discussed the action in New Jersey resulting in the repeal of this special statu te m aking silicosis and asbestosis compensable. This amendment, which became effec tive Ju ly 1, 1951, m eans th a t th e re is no longer a distinction between bene fits arising from disability or death in traum atic injuries from those of oc cupational diseases. The state of M aryland amended its law, changing from the scheduled type to general coverage. A new and novel feature of the law is the treatm ent of compensation fo r dem onstrable evi dence of pulm onary dust disease where capacity for work is im paired short of total disability. Then the com mission may g ra n t an aw ard of $1000 with the right to the claim ant to re open the case w ithin five years if the disability has become perm anent and total disability or death has ensued. An amendment to the California compensation statute, which could be of serious concern to industry, pro vides th a t an injured employe m ay as se rt his claim for occupational dis ease compensation against any em ployer for whom be previously worked irrespective of the date of term ination of employment. If tria l be held against such an employer, other of the indi vidual's form er em ployers m ay be r e quired to contribute. This am ounts to complete abrogation of the statu te of lim itatio n s. An amendment to the New York W orkm en's Com pensation A ct deal ing with perm anent total disability or death from silicosis which m ight re sult in retroactive benefits fo r in ju ries was pointed to as one th at hears watching. The statu te had an escala tor clause of m onetary benefits for permanent total disability or death and now, th ro u g h a 1951 am endm ent, permits the reopening of the original cases and increases the benefits pay able to those com parable to the full benefits of the law fo r other occupa tional diseases and death. The employ er is relieved of liability and th e costs are chargeable to the special disabili ty fu n d ; the law is retroactive in its effect. Mr. W aters' comments on "exclu siveness of rem edy of workm en's compensation statu tes" were built around a recent court decision which raised questions and problems as to the potential liability of employers to the spouse of an employe who has been injured and whose claim is com pensable u n d er th e w orkm en's com pensation statu te. In the ease in ques tion, the w ife of an injured employe brought common law suit against the employer for loss of consortium (de fined as the sum of those expectations growing out of the m arital relation ship to which each spouse is entitled, such as companionship, society, as sistance, comfort and affection) with her husband because of injuries for which he received full compensation. The court sustained the right of the wife to m aintain such action and the precedent of th is case may possibly lead to sim ilar decisions by other courts. This case was used by Mr. W aters to point out potential liabili ty in a field where the employer may have felt secure. This liability may be protected ag a in st by w orkm en's com pensation insurance and public liabili ty insurance which protection was strongly advocated. In his comments on trends in rates applicable to w orkm en's compensation, Mr. W aters said th at whereas the general trend in insurance rates has been downward over a ten-year period the picture has changed because of increased benefits under the compen sations laws and unfavorable experi ence in a num ber of heavy industries. Higher rates are anticipated for the coming year. National experience as to occupa tional diseases has continued favor able, including silicosis, with the re sult th at decreasing rates are expected 114 BOCK PRODUCTS, December, 1951 H ardinge 8 ' x 48" Scrubber w ith 6' x 6' screen, rem oving clay fro m 6 0 to 80 tons per hour o f m inus lY z " m aterial. HARDINGE SCRUBBER KEEPS QUARRY FROM BEING ABANDONED A west coast sand and gravel firm was faced w ith a quarry shut-dow n due to exhaustion of their high-grade deposit. Below th e 32' level, extensive deposits of the excellent sand and gravel were present, hut unfortunately elay strata ran th ro u g h this entire low er section. action" w hich is sim ilar to the effect obtained by rubbing a handful of peb bles together betw een the palm s in a bucket of w ater. T he H ardinge Scrub ber installed was an 8' diam eter x 48" cylinder u n it with a 6' x 6' dew atering screen. The problem then, in o rder to con tinue operation, was to find a suitable w ashing device to elim in ate th e clay, which w hen wet is very sticky and difficult to wash and process. T he solution was found in a H ardinge Conical Scrubber. T he scrubber con sists of a conical shell like th a t o f th e w ell-know n H ardinge C onical M ill, dis charging into a cylindrical dew atering screen w hich is fastened to th e dis charge end of the scrubber and rotates with it. In tern a l liners an d special lift ing flights create a tu rb u len t " m ass A bout 3 0 % to 3 3 % o f th e to ta l raw m aterial entering the entire plant passes through the H ardinge Scrubber. Usual w ater requirem ents fo r a scrub b er of this ty p e a re 2.5 to 3.0 G.P.M . p er ton p er h o u r o f feed. Now in full operation, the H ardinge u n it has fu l filled ex pectations in re g ard to quality of output, sim plicity of operation, tonnage handled, m echanical aspects and its overall econom y o f operation. The sand and gravel as now processed in the new w ashing p lan t is m ak in g an excellent p ro d u ct, one th at m eets every federal, state and local specification. HAR COMPANY, DINGE INCORPORATED YORK, PENNSYLVANIA-- 240 Arch St. Main Office and Works NEW YORK 17 SAN FRANCISCO 11 CHICAGO 6 HIBB1NG, MINN. TORONTO 1 122 E. 42nd St. 24 California St. 205 W. Wacker Dr. 2016 First Ave- 200 Bay St. )3fi H O C.TC P R O D U C T S r> p r - o m K * i o t i Industrial Sand Meeting (Continued from Page 11}) and th at is not the total. Our policy is to be one of increasing boldness in international affairs even a t the risk of all-out w ar. A United States of Western Europe is badly needed, he said, to overcome an impossible situation as it now ex ists. The British Em pire is nearing disintegration and there is nothing to stop it. The fu tu re will be difficult, said M r. Ahearn. We m ust have an arm y of a t least 3,500,000 m en an d th e outlook is for more taxes. A new tax bill fo r 1953 is expected. In 1945 d u rin g th e peak of World W ar II we were spend ing $95 billion an d had a national in come of $50 billion. W e will spend $88 billion fo r th e fiscal y ea r 1952 an d have a n atio n al income of $81 billion. Wage and price controls are expect ed to prevail for a long time and little change is expected and th a t hope rests only in Congress. Coal strikes are ex pected to add to the difficulties. The nation has no protection against m ajor strikes and the force of public opinion is the only thing we have to settle strikes but John L. Lewis h as already shown his indifference to th a t. It is expected th a t strik e s in th e steel industry may also cripple the nation. The split between th e C.I.O. and A.F.L. is considered a fortunate devel opment because, when working to gether, they constitute a powerful po litical organization. This split is ex pected to benefit the Republican chances of election and, it is believed, probably was a factor in Senator T a f t's re-election in Ohio. T his is like ly a w orry to th e T ru m an a d m in istra tion. Mr. Ahearn cautiously predicted that President T rum an will not ru n for re-election in spite of g reat pres sure upon him as the most powerful Democratic candidate. People have short memories and soon forget m is takes, he said. V ice-President Barkley, Judge Vinson and defense secretary Lovett were mentioned, among others, as possible Democratic candidates. Among the Republicans, Senator T aft is most likely to he nominated for the presidency. General Eisenhower is looked upon as an am ateu r politician and there seems little chance for either Stassen or Dewey. The predic tion was th a t the election could well shape up as a contest between Judge Vinson and Senator T aft. Communism, Acheson, spending and corruption will be the main Repub lican issues in the 1952 campaign. The budding T aft-D ew ey ''in tr a m ural" issue m ight menace chances for Republican success. Mr. A hearn does not believe a th ird world w ar will come in the imm ediate future, although there is always a possibility of being pitched headlong into w ar. The Russians believe it un necessary. to destroy the United States, to achieve their objectives. Ex cess population and dwindling re sources throughout the world are con sidered a greater menace than Russia. In conclusion, Mr. Ahearn suggested th a t it would be the wise thing for people to keep their sense of humor. N.P.A. Issues Amendment to Order M-78 N.P.A. Order M-78 which esta b lishes procedures for the mining in d u stry (replacing CMP-Reg. 5) in ob taining MRO items and minor capital additions and which also provides for the submission of applications to the Defense Minerals Adm inistration for obtaining priority assistance for m ajor capital additions, has now been amended. The order, as amended, in cludes the following provisions: Section 1 refers to the allotm ent symbol (H-(5) and the ra tin g (DO-H6) which may be used to obtain lim ited quantities of controlled m aterials and products and materials other than controlled m aterials for MRO and capita! additions. Section 2 deals with definitions of words and term s used throughout the order. It has been amended to read as follow s: "M aintenance'' m eans th e minimum upkeep necessary to con tinue any plant, facility or equipment in sound working condition, and "re p air" means the restoration of any plant, facility, or equipment to sound w orking condition when it has been rendered unsafe or unfit for service by wear and tear, damage, failure of p arts, or the like. Neither "m ain tenance" nor "rep air" includes the re placement or the improvement of any plant, facility or equipment hv replac ing m aterial which is still in sound w orking condition with m aterials of a new or different kind, quality or de sign. Section 3 explains the use of the new ratings. Subject to quota lim ita tions and other restrictions of the or der, every producer has the right to use the allotm ent symbol "H -6" on de livery orders for controlled m aterials fo r MRO and m inor capita! additions, b u t rise o f this symbol does not consti tu te the m aking of an allotment. Also, the allotment symbol may be used to acquire only th at am ount of controlled m aterial actually needed in the com pany's operations. Section 4 gives the right to use the ratin g "DO-H-6" to ob'ain MRO items an d minor capital additions which do not require controlled m aterials. A gain, th is ra tin g may be used only fo r m aterials needed in the com pany's operations. Section 6 deals with m aterials for w hich the allotm ent symbol and DO r a tin g m ay not be applied or extended. They may not be used to obtain any o f the m aterials listed in Schedule I o f CMP Reg. 5. T here are no excep tions. The ratings may not be applied by a producer to obtain in any q u a r te r (calendar or fiscal) m aterials for MAKE INIS TEST YOURSEIF...WITH * F R E E P S U M Tie a knot in a Tuffy Sling, then pull it tight with both hands and feet. See how flexible it is -- and how it straightens out without dam age. The secret is in the braided fabric construction -- a patented Tuffy feature! Scores of wires are stranded into 9 parts, then machine woven into an interlaced wire fabric entirely unlike conventional wire rope slings. Even cutting one of the 9 parts does not result in stranding. 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