Document Rj78oMrpxNnk4NmvedxrMaBwE

4 PLAINTIFF'S EXHIBIT Drywall FIRST FORUM OF THE DRTWAU INDUSTRY AGE new back-blocking system ISSUE 3 1957 FOR HORIZONTAL SIDEWALL JOINTS The success-proven system of back-blocking dry- wall jobs has been extended to include long hori zontal joints on sidewalls. The method, newly developed by United States Gypsum Company, supplements procedures previously suggested, and widely adopted by drywall applicators, for backblocking ceiling joints and vertical joints on sidewalls. Back-blocking has been determined to be the most effective method of minimizing possibilities of ridging and other joint difficulties on single-layer application of wallboard. Further information is available trom local United States Gypsum sales representatives or from the district office nearest you. SCABS of scrop SHEETROCK wallboard are nailed to studs to position backing btocks.They should be centered on the stud width to put the bocking block surface precisely flush with the stud face when it is toenailed in place, as is being done here. PERF-A-TAPE cement is applied to the bocking block with a notched spreader blade. SHEETROCK wallboard is then nailed to the framing in the usual manner, the backing blocks having been positioned to bridge the long horizontal joint between the panels. They equalize the finished sur face joint treatment, and give the joint firmness that resists ridging. A FiNISHED-ONE-SIDEonly partition can be bockblocked from behind after the wallboard has been erected. These backing blocks, with adhesive al ready applied, are toenailed behind joints. BB03Q 2413 4 -* Super-strength SHEETROCK expands r PROVES THE ECONOMY OF THICKER W Vi- in. SHEETROCK WAUBOARO stacked and ready for application in a Centex house, has the same composition as regular SHEETROCK. The only dif ference is in the extra thickness which contributes to the superior strength of the board. Notice that board does not bend or sag as it is pulled away from the stack. Opportunity for higher volume was presented to the nation's drywall contractors recently when United States Gypsum made its ?^-in. Sheetrock wallboard available in all areas. With the thicker board, drywall contractors can offer the best single-layer construction at only a slight premium cost. Tom Lively's Centex Construction Co., currently the largest residential builder in the U. S., was one of the first to adopt the thicker regular-core board. Centex made the switch on the basis of economy as well as quality, for the company had been applying H-in. board to 1x4 furring strips attached to trusses spaced 20 in. o.c. The furring strips were considered necessary to support the overhead insulation. By converting to hA-'\n. Sheetrock on the ceilings, Centex was able to completely eliminate the furring strips and in crease truss spacing to 24 inches, saving one truss out of six. This saved 300 bd. ft. per house in furring alone--made possible by the board's 25 percent greater thickness and its increased bracing strength and tion. And, E. L. Higgins, G reported still another saving f construction: callbacks for rep: Centex has realized benefit? more than 2,500 houses built these benefits are available to a ard framing practices, the extra wallboard allows all studs and in.--an appreciable saving in bet sound transmission and higher sales qualities which are pointec These advantages add up to drywall contractors to win nev to promote the 5s-in. Sheetro that is as logical as was the ste H-in. board. They also will re; s0Ouo3> to ` > ROOF TRUSSES, and all other framing, may be placed 24 in. o.c. when s/i is used as the surfacing material. Now Centex, in converting from 20-in. tc requires only five trusses where six formerly were used. The Vb-in. SHEETRC the wool baft insulation easily without further bracing. arket... ii LLBOARD finance to lateral distorex construction director, n this simplified form of s dropped sharply. >m the stronger board in the past year--and now judders. Even with standength of 5 8-in. Sheetrock lsts to be centered at 24 abor and lumber. Reduced ipact resistance are other ut by drywall contractors, excellent opportunity for jusiness. Those who begin will be leaders in a trend y transition from :i-8-in. to the greatest rewards. KEY MEN who directed the first residential use of 5/*-in. SHEETROCK wallboord were Centex president Tom Lively (right) and Osborne Fernold, director of purchasing. Vicepresident E. L. Higgins (not shown) also helped instigate adoption of this system. RECOMMENDED NAIL for Vi-in. SHEETROCK is the 1 Hin. annu/ar-ring type for either conventional spacing or double-noiiing attachment. Conventional spacing is 7 in. on ceilings and 8 in. on sidewalls. For double-nailing, proper spacing requires two nails spaced two inches apart at 1 2-in. intervals. SHEETROCK n. spacing, also carries SCORING AND SNAPPING of 5/-in. SHEETROCK gypsum wallboord is just as easily done as with thinner wallboards. according to mechanics who have worked with both types. \\ s p? 'A'"' -W # \ ALTHOUGH THICKER, the 5/i-in. SHEETROCK can be hondled as easily as the lighter boards. One of the men shown here lifting o 12-ft. ponel commented that %-in. board was actually easier to handle because it is more rigid. It is available in standard 8, 10 and 1 2-ft. lengths. UO> O iSaUE 3 I95> Published Quarterly by United States Gypsum Company 300 W. Adams St., Chicago 6, III. Printed in U.S.A. COPYRIGHT 1957. UNITED STATES GYPSUM NOTICE: The following trademarks are owned ond or registered m the U.S. Patent Office by the United Stotes Gypsum Company, ond are used m this mogazme to designate products manufactured by that company: SHEETROCK tcypsum wallbooro), PERF-A-TaPE lioint rein forcement). SHEETROCK Brand lodhesive). COMPANY US 6 A-73 L BAZOOKA-TYPE GUN CONTROLS adhesive application IOAOING TIME is reduced by the special large-volume pump especially designed by the Ames brothers for the new adhesive "bazooka". When a plunger touches his left hand, the work man knows the gun is looded to capacity. Immediately after United States Gypsum put its Sheetrock Brand Adhesive into national distribution, the Ames brothers, taping-t < >1 manufacturers and longtime advocates of adhesive-drywall construc tion, unveiled a new bazooka-type gun for mastic application to framing. According to the first drywall contractors to use the ux>l. it offers advantages over the commonly used caulking gun. Developed and perfected over an 11-year period, the Ames adhesive gun consists of a special automatic feed sys tem coupled with a guide wheel which lays down an ad hesive ribbon of just the right size in the exact center of the stud or joist face. The length and capacity of the new tool are other advan tages. Its long tube-handle of ten makes tt possible to elim inate scaffolding when working on ceilings, and reduces the usual back-racking stretching of overhead work. And. the 5-pint capacity coupled with the large-volume loading pump, also developed by Ames, reduces time spent in refilling the dispenser. Complete information on the new toot is ovot/ob/e from Belmont Mfg. Co., 505 O Neill Ave., Belmont, Calif. BB030 2416 WITH GYPSUM DRYWALL construction il is recommended thot heoting tubes be noiled to joists over insuloting wollboord (foil side down) with 2x2 fur* ring strips porolleling the tubes. Regular wollboord is nailed to the furring strips ond becomes the octuai ceiling of the room. Drywall FIRST FORUM OF THE DRYWALL INDUSTRY AGE ISSUE A 1957 __ what we know about RADIANT HEAT AND DRYWALL WIRES ARE STAPLED to the SHEETROCK wollboord c* spocmg of from 1 Vi to 2 Vi in. depending on heflt -equirements specified oy the engineer. CEMENT IS APPLIED to face layer wollboord to o thickness of !4 in. While still wet, face board is then applied ond noiled to the joists. t's the "next best thing to the sun". That's what radiant heating people say I about their systems for both residential and commercial heating. Cleanli ness. uniformity of heat, absence of drafts and decorative freedom are just a few of radiant heating's advantages. To obtain these benefits, the system must be carefully designed and specifications closely followed. Drywall contractors are well advised to let all phases of the design of a radiant panel heating system rest with the heating engineer, including drywall specifications. The drywall contractor need only be certain that maxi mum surface temperature of wallboard is no greater than 115 degrees. With a hot water system, insulating Sheetrock wallboard is nailed paral lel to the joists, with the aluminum foil facing downward to act as a reflector above the heating coils. Dry, seasoned 2x2 furring strips support a face layer of regular Sheetrock which conceals the pipe. Hundreds of electric radiant heating systems have been installed with drywall construction. The installation method most widely used is that of stapling heating cable to the foil surface of insulating Sheetrock wallboard which has been nailed to the ceiling joists with the foil facing down. PerfA-Tape cement is applied about 14 in- thick to the back of the face layer of wallboard, which is then nailed in place over the wires. Electric heating cable is about Vg in. in diameter, and is thus embedded and sandwiched between the two layers of wallbcard. The embedding carries away and distributes heat more rapidly, minimiz ing the danger of excessive heat build-ups. A temperature of about 115 degrees is nearly sufficient to cause calcination of the gypsum in the wallboard. It is advisable not to operate the heating system until after taping and finishing of ceiling joints is completed and cement has thoroughly dried. Although the "experts" declare that they still have much to learn about radiant heat in drywall jobs, carefully installed systems have been bringing great, satisfaction to a multitude of customers for a number of years. With new recommendations soon to be released, satisfactory job results will be come more certain. _ ONLY THAT THICKNESS of SHEETROCK wollboord should be used on which the radiant heating engineer hos bosed his design. Use of o thicker boord moy couse failure of the system to produce sufficient warmth throughout the room. BB030 2417 COPPER-RIVETED leother tool pouch is smoll and compoct, yet holds every tool needed for wollboord application. Comfortable to wear, this 8x9l/j-in. pouch keeps tools hondy ond convenient to the user. It contains o rule holder, pencil holder, hook knife scobbord, deep sow sheath, oil-round circle cutter ond hammer. It is available from Waiiboard Tool & Equipment Co., 1708 Seabright Ave., Long Beach 1 3, Calif. for Drywall applicatio AN ALBUM OF TIME AND C< or big jobs or small ones, new waiiboard ha: Fbeen developed to ease the mechanics' task. T ever, and the value of such mechanical aids is r most cases, use of these devices has resulted in si plete a job as to fully justify their cost. A TOOL WHICH CUTS switch box holes neatly and quickly in drywall comes with cutting heads (left! for 2x3, 2x4, or 4-m. round switchbox openings. By use of cutting dies, the tool elimi nates patching of irregular holes cut by conven tional methods, since it breoks away no excess drywall, does not split the bock side of the sheet nor domoge the paper facing on either side. Details are available from Hortmeister, 2020 W. Barberry PI., Denver 4, Colo. J . )n... indling and application devices have There is a wide range of prices, howrelative to the needs of the`user. In each savings of time required to com- A WHEELED DEVICE permits movement of wollboord from truck to job-site in holf the time required by the old strong-arm method. Moving boord with Verti-Roll eliminates need for o third mon: two men con nonale two bundles of any length ond thickness at one time. The unit consists of two steel damping devices (right), eocn mounted on a wheel for eoch ena of the bundle. Weighing but 30 pounds ond measuring 27x25 in., Vern-Rolls ore easily hauled from }00 to |ob. Tests run with the device mdicote that board con be handled with twice the speed and with far greater ease than with former methods. Further information is available from Polmer Industries, 846 W. 56th St., indianopolis 6, Ind. AN ECONOMICAL AND VALUABLE DEVICE for use with the TRUSSTEEl Stud Double-wall system is this tilt table, constructed of 2x4 lumber. PERF-A-TAPE Cement is applied to finish layer of wollboord -- table then tilts to vertical position for plocing boord on wall. Cross piece marked "A" is loose to act as o stiffener when tilting the wollboord into ptoce. A dowel is used to hold the tilt toble upright while plocing the boord. BB030 2419 DiywaU ACC ISSUE 4 1957 FIRST FORUM OF THE DRYWAU INDUSTRY Published OwO'ierly by Untied Stolei Gypsum Compony 300 W. Adams Si.. Chicago 6, III Ross Schfom, Jr., Editor Printed m U.S.A. COPYRIGHT 1957, UNITED STATES GYPSUM COMPANY NOTICE: The following trademarks ore owned ond or registered in the U.5. Potent Office by the United Stotei Gypsum Company, ond ore used in this mogoime to designate products monufoctured by the company SHEFTROCK (gypsum wallbooro). PERF-A-TaPE !io*m re inforcement); SHEETROCK Brand (adhesive) TRUSSTEEl (metal studs). DRYWALL .CONTRACTORS TO MEET JAN.'16-17 IN CHICAGO United States Gypsum 300 West Adams Street Chicago 6. Illinois :' * US paiD . Ch,c90- 111 P-- , rr-1T 7 &0 Hiss G. Judd, : Dept. 157-A ^WAYKE VAUGHN, right. preiidn>. and SHERWOOD SJTZ, mxmco* Open Ccnvnhon al Shaman Hotal, ion. 16. p-- ^r FIRST NATIONAL CONVENTION ----- of - .. . . ' DRYWAU. CONTRACTORS SHERMAN HOTEL . CHICAGO, ILUNOIS JANUARY 16-17, 1958 . .. =. '? PROGRAM , - THURSDAY, JAN. 16 Mawwagi Bunao** moeteig to oulfirte post yoor's cKfivitios of llw _1 &AY, JAR. XT' Morningt Business aeotng. Section of officer* and dtreOotu Afternoon Forum discussion for ejichange of general information. Banquet Short addresses by industry leaden and top union offlook. IT MTtKNATtONAL MYWAU CONTRACTORS ASSOCIATION SUin 1010 0t SOUTH NMX ST. : lot ANflWffS 14. CAUP. WAUBOARD PANELS con be cut and lapped to make a "clinker" type wall, fine for playrooms or fomity rooms. Panels, with fomfs exposed, may be pointed In alternate shades of color to form a background for trophies, other ornamentation. when competition is keen, suggest a . . . DECORATIVE USE FOR WALLBOARD added s Jx roc developed with Sheet'd decoratively. in new building....... 0, and remarkable effects can be achieved. Used with imagination on ceil ings or walls, this versatile board can emphasize, conceal, raise, lower or beautify for nominal cost. Develop a few of these ideas and suggest them when you are asked to bid your next job. When competition is keen, a fresh idea can tip the scales of customer preference in your favor and add to the size of the ticket. A CUSTOM-MADE RECESSED CEILING gives rooms the oppeoronce of greeter height. Strips of wofiboard go right over the ceiling to form a raised border, which, painted a darker tone of the ceiling color, visually occentuotes the recess. TOO.HIGH ROOMS can be cut down to size by instolling a dropped ceiling (above) to rescole old-foshioned rooms and bring them up to date. Or wall* boord can be formed into sweeping curves (left) for un usual fireplace wollt or stoirwells. Virtually ony contour can be ochieved with wallboord. I) V TV