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1945 Theatre Catalog, 4th Edition, Page 158 (136)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 158
Page 158

1945 Theatre Catalog, 4th Edition, Page 158

number of exterior uses sh0w its resistance to weathering. The roof of the Pennsylvania Station, New York, is an example. Ventilators, skylights, and expansion joints are made of Monel and used without protective coatings.

Of a more obviously decorative nature are the applications of Monel to doors, grilles, lighting fixtures, and the like. Where relatively dry conditions obtain, weathering may give only a translucent film in place of a distinct patina. The original surface can be retained by regular cleaning. Monel can also be given an adherent, durable, basic-oxide coating by heat, as in forging. Two-tone effects are easily obtained by burnishing an uneven or hammered surface so oxidized. Intricate, beautiful forgings and castingsgas rosettes, plaques, and moldingsgare made. Monel may be etched and engraved.


Tin is used to coat sheet steel in making tin plate and with lead to form terne plate. Terne is much used in some 10calities as roofing material, and it gives the appearance of sheet lead. These sheets may be readily joined by soldering, as well as by usual seaming means. Since corrosion resistance depends entirely on the coating, any imperfection or local mechanical injury leaves a spot exposing the steel, which corrodes rapidly.

Pewter, etc.

Solid tin and tin-rich alloys, such as pewter, are comparatively costly and are rarely used for decoration; even tinned steel, copper, or brass have very limited applications. The tin coating resists atmospheric corrosion and is an attractive silvery metal, but as it does not galvanically protect the base metal, any pin-hole or mechanical injury destroys its usefulness as a coating, since rust or copper stain shows strikingly on such surfaces. A process for white-bronze

THE STANDING SEAM ROOF, shown in this photograph provided by the International Nickel'Company, lnc.,

is being installed on Wing D of New York's Metropolitan Museum of Art. Monel metal is the material being laid: down. Compare this type of roof with that shown elsewhere on this page. The properties of Monel, an approximate 65-35 nickelvcopper alloy, make it valuable for any interior as well as exterior-applications.

plating and one for tin-coating wide, cope perufoil strip may eventually be used in decorative work.


The Corronizing process, developed by the Standard Steel Spring Company, consists of electro-plating metals or alloys with a thin layer of nickel and of zinc, then subjecting the coated metal to high temperatures. The two electrodeposited metals diffuse together to form a coating which possesses unusual properties of resistance to corrosion. Treated metals have a semi-lustrous, gun-metal color, a noneflouring surface suitable for paint and other finishes. Among the products lending themselves to the process are ash cans, hotuwater boilers, refrigeration parts and equipment, airconditioning equipment, oil tanks, flash THE STANDlNG LOCKSEAMED ROOF of the Brooklyn Museum/s north wing has a large ridge cap made of 0.021-inch Monel, soft-soldered flat longitudinal seams. Masonry on the end is capped with Monel. Also shown in this International Nickel Company, lnc., photograph are Monel expansion ioints, Manel gutters, and Monel ventilators. The head of the hanging staircase is also sheathed in Monel. (The skylight is of corrugated glass.)



light parts, roofing, stokers, heaters, gutters, spouting, thermostats, electrical equipment parts, and hardware.


By far the largest use of zinc in architectural work is as a coating on steel for galvanizing. Considerable sheet zinc is used in roofing, however, particularly on the continent of Europe. Continuous zinc strip is used to eliminate cross joints. Zinc finds its way into many fabricated articles and probably can always be found in some place or other in the construction field in the form of die castings, zinc coatings, and brass. Sheet zinc is also used for sheathing parapets, chimneys, and for conduction of rain water from roofs. It is relatively inexpensive, is not dif'chlt to form or handle, and corrodes Very slowly. Since phenol in coal tar is said seriously to corrode zinc, it is advisable to avoid contact between tar and the metal.

Zinc-base die castings, plated with chromium or other protective coatings, are used only to a limited extent for dece orative door and window hardware. Decorative steel railings, fences, scroll work, and the like are sometimes protected from corrosion by hotedip galvanizing, with 01' without subsequent painting.

Galvanized Steel

The importance of galvanized steel in modern construction and as a basis for decorative paints is too great to ignore. Galvanized-steel sheets are the cheapest material of metal construction which will really withstand exterior weather for many years. If further protected by painting at intervals, this period may be extended almost indefinitely. Of particu1.11' importance has been the treatment to permit painting the galvanized surface immediately after it has been erected. This is usually accomplished by dipping the sheets into a phOSphoric-acid-base solution, whereby the smooth zinc spangles

1945 Theatre Catalog, 4th Edition, Page 158