Safety the goal for FIFA sta­dium light tow­ers in Port Moresby

DEMM Engineering & Manufacturing - - PRODUCT WATCH - DE­TAILS, NEVILLE STU­ART PH: 021 667 716; E- MAIL: NEVILLE@ENERPAC.CO.NZ

As sport­ing grounds glob­ally seek bet­ter light­ing for in­ter­na­tional and daynight matches, close at­ten­tion is be­ing paid to en­sur­ing the safety of these tall and heavy struc­tures.

One of the es­sen­tial el­e­ments of en­dur­ing sta­bil­ity dur­ing buf­fet­ing by high winds and storms is even bolt torque­ing of the fas­ten­ers that se­cure light­ing tow­ers to the base. As with bolts used to se­cure key in­fra­struc­ture such as off­shore drilling rigs and on­shore min­ing and in­dus­trial plant, these bolts must be tight­ened to pre­cise and equal ten­sions to de­liver the top re­li­a­bil­ity ex­pected in work­places and pub­lic spa­ces.

With safety in mind, L& A Construction has used Enerpac bolt­ing tech­nol­ogy to pre­cisely and evenly bolt down the eight main light­ing tow­ers in two PNG sta­di­ums used first for Women’s U20 FIFA World Cup, which kicked off in Port Moresby in Novem­ber 2016.

The Bava sta­dium and the PNG Foot­ball sta­dium (PNGFS) both have four 35m light­ing tow­ers, which needed their foun­da­tion bolts to be firmly se­cured to main­tain their up­right po­si­tion un­der di­verse trop­i­cal con­di­tions. The 18 x 56mm base studs were bolted with 9500Nm of torque us­ing an Enerpac S-Se­ries S11000 torque wrench, supplied by Bishops Port Moresby. These are from the same Enerpac pro­fes­sional bolt­ing ranges used glob­ally on some of the world’s biggest build­ing and in­fra­struc­ture projects.

The Enerpac S11000 torque wrench was ac­tu­ated by a ZU4 torque wrench pump and utilised a THQ706T 6m hose and BSH1585 11/2” drive with 85mm socket, all supplied through Bishops.

Antony Smith from Bishops Port Moresby said the Enerpac gear was ideal be­cause it pro­vided speed and ac­cu­racy as well as trace­able bolt loads. “The large nut ro­ta­tion per wrench cy­cle and rapid re­turn stroke of the S-Se­ries makes the job par­tic­u­larly ef­fi­cient,” he said.

“Enerpac ZU4 pumps are ide­ally suited for use with torque wrenches, and use a pow­er­ful 1.7 hp univer­sal elec­tric mo­tor, which gives a high power-to-weight ra­tio and ex­cel­lent low-voltage op­er­at­ing char­ac­ter­is­tics. It was the first time PNG had hosted such a ma­jor in­ter­na­tional sport­ing event, so it was very im­por­tant to ev­ery­one that the fa­cil­i­ties were safe and ready for the event,” he said.

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