Document DvQGvJXaaGjbneEkpo6LDGp1a

LIA22575 J^S_ * _ LEAD INDUSTRIES ASSOCIATION SO CAST 42n STREET NEW YORK 17, K. T. April 1, 1560 SUBJECT: LEAD DOME HARKS 27TB SERVICE-FREE YEAR To Members of the Lead Industries Association: We are pleased to attach a reprint of an article entitled LEAD POKE MARKS 25TH SERVICE-FREE YEAR, which appeared in HEATDC A AIR COHDITICWmO CONTRACTOR, January, i960, issue. Additional copies, up to 25, are available and will be supplied free of charge to members upon request. Above this quantity, they can be sup plied to members at our cost of 11.80 per hundred. Die publication of this article was a result of our publicity prograa and was prepared with the assistance of David Dcgnan, Chief Maintenance Supervisor, Hew Jersey State Prison Faro, Rahway, K.J. Distribution of this reprint will be node by L.I.A. to over 1U,000 architects, sheet aetsl workers, and municipal engineers. Sincerely yours. Secretary r*--~ v L IA22576 -- --- , A1A No. 12-A4 r SACK IN 1735, the New Jersey Stole Prison Form looked like this ot the dome wot being re-roofed with hord theet leod. Note tcoffolding ot right of dome, vintage ovtomobiles porked below. IN 1959. the chorocterittic leod polim* h evident throughout the dome. No discoloration fror* ror^wote' runoff hot occurred ot either the dtme's boto or on the building's tidev 9 LEAD DOME MARKS 25TH SERVICE-FREE YEAR i If Devld Degnoo Virtually no imtintnonc has bn rtqulrtd on the leod* Chief Mointenonce Supervisor New Jersey State Prison Forte Aohwoy, N. J. covered dome of this prison building* Dosplto hurri canes, a highly corrosive atmosphere, and the passing of 25 years, the hard lead roof looks as good as new. AtA No. IJ-A4 n e or mi umrjJT Irad-cov- way. Since Oh * present load s! loath O crixt domes In the world Is ing was applied In IMS, virtually now entering Us 2Sh year U trou-no attention has bora required hlr-frvr senior. Tlw huge struc other than an annual inspection. ture. which meavurrs i.k mt then Thr existing roof was Instilled 100 ft e<T(\s j( llir Ink', is hmtrd after thr original copper covt ring atop 0r main Inulding at tlir New (upplitxl when Ok * building v**pt Jenex State Privm Farm io Rah up in 1901) faikd Severe dis- i N 1966.01 r Xv *ki DETAILS OF ROOF construction or* shown in thH close-up. Sheet* or* loos*-locked to bottom ond *odi other without the use of soldec. When the roof wos Installed, oO joints were filled with o non-horden ing mastic. i 1 SIZE OF DOME con be goged from this oeriol photo. Though th* immediate surroundings or* rural, numerous refineries* smelters, ond factories ore located in the area. Corrosive fumes from these plants coused the origlnol copper covering to foil. ViUUMHIHil^lHl 22577 LU t / 8 r*a'y cxiloratiuu and nuua-rous Iraki drvekiped in thr old copper rouf as the n*Milt of thr highly cormtivr atmosplwre around Railway, w -Imt c tuiinermu refineries, smelt* m, and industrial plants are lo cated. Because of this rurrosiiHi problem, k'ad was wh'cted as Hu* re-roofing material. Construction DitalU llie prvwnt roof b batten-scam throng)milt. Battens are spaced about 4 ft apart at the base and arc fastened to the deck by mean* of tnfigk* bohs. Cross sections measure roughly 2x2 to., with uppr comers rounded and a slight taper at the base. Before installation. live lutteus were im|m*natcd with creosote. Wlien tle lead sheathing was applied, an iindi-flay of 30-lb as* plu.lt felt and lk-lb deadening felt was first put in place. The basic wnfing material was .1-lb hard lead, alkiyrd with 7.5 per <vnt an timony for greater strength. Most of tlie sheets usM in the installa tion measured 2 x 4 ft heforr trimming. No Milder was tea'll mi llr roof, (nstrad, the sheets weft* loose* kick'd to each other and to the hjft<*n raps. Copper cleats, fas tened to the deck and battens, were uxd as a prefi-rrvd alterna tive to driving nails llimugh thr tluri lead. All joints were filled witli a non-lurtlniinti mastic. "Hiis gcmral application mctliod pro vid'd amply for expansion and dHitraction. aivd is utwloul(<dly one fatl'W in live rooTs kng trimble-frre life. The installation was made by Kdwin H. Iluddy & Smu, a promi nent Trentin, N. ]., sheet metal shop specializing in architectural work for instilutioos. (The Huddy firm is >tiU in ctixtnicr and still on KACi circulation rolls.) Tbr k*ad sltcets were trimnwd to size in the Muddy shop, then seamed at thr job site. The entirr job took ahmit hm months to complete. Uttit MaIntviwnM Nttdaf \fter almost 2S sear* of service, die lead sheathing on the dome imitinue* in excellent condition. \ir pollution iu live Rahway area lias intensified greatly in the last quart.T ivntury, but it has had no cfhvt whatever on the dome. Tbr ituoaitiristic lead patina b now uniform!) evident throughout, and there has been no trace uf db- coloration cither on the dome <* at tbr hast* as tbr ri*uh <4 rain water runoff. MaintcaaiKv-wise, tlie uuK re pair werk nreilrd to date was necessitated In a sevifo hurricane which piwtl tlimugh Rahway in 1952. Rut d.'spite pounding by winds of more tliaii 90 mpb. onh one of five hundreds of loose- hwk-d slu'vt*. wax w*rkid free from its iMtti-n This insignificant djinage wax rjuly repair'd after the winds MitnKkd Km k m I'tT) w lmi (In- pixx-nt rtwf was applied, kud was selling for afxMit If a pound and sheet metal fminvex met; win- paid Si 00 .m hour or k-ss (hi tin' luisix <4 fbev costs, tla* dome <ould be tom down todjy and sold as scran lor Havre tluu t cent to *nt 25 xvars ago. Time, it has quite liter ally pawl f(K ttvlf. No more encld lie asled of any roof. DETAILS Of ROOf CONSTRUCTTlON ora shown in rhoto skotchoi. Us# of coppor c<#on d*d owoy with th# nood for driving noils through oy pooion of food shoots. irr L I A22579 Reprinted from HEATING & AIR CONDITIONING CONTRACTOR Jonoory, 1960 Distributed fay LEAD INDUSTRIES ASSOCIATION 292 Madison Avenue New York 17, N. Y. o ww*afr o