Adding 39 Tons of Steel to the Top of the Empire State Building


When engineers made plans to reinforce and upgrade the carrying capacity of the Empire State Building’s mast and tower by adding 39 tons of steel, they had to find a way to protect pedestrians from falling rivets, tools and materials. Roofing the observatory and building bridges over the sidewalks 1,250 ft below were lousy options. The top of the iconic New York City building has an open-air observatory at the 86th floor and premium viewing spaces at the 102nd and 103rd levels. Annually, these spaces host about 4.3 million visitors and generate about $85 million in revenue. Soaring above the busy streets, a 200-ft-tall steel broadcast tower bristles with antennas that generate about $20 million more. Together, the observatory, mast and tower are the crowning jewel of the 86-year-old icon, which is owned by the Empire State Realty Trust Inc.

They came up with a design for a sheltering “cocoon,” which sits on a 560-sq-ft aluminum elevated work platform, or “dance floor.” The platform is braced from below by steel brackets through the conical ice shield, which is there to shatter ice falling from the tower.The search for an alternative to scaffolding dates to February 2014, when the ESRT’s building engineer, engineer-of-record Thornton Tomasetti, site safety engineer Plan B Engineering and contractor Skanska USA Building Inc. began to consult with New York City Dept. of Buildings officials to devise a plan that would not only protect the public and workers but also allow for the strengthening of the mast and tower without having to resort to sidewalk bridges.

Further, the outer edges of the dance floor are guyed by cables leading up to the roof of the cocoon and the tower above. Encircling the exposed base of the tower just above the ESB’s roof, the floor is enclosed by walls created by aluminum truss towers arranged in an octagon and bridged by panels of ballistic cloth, which slide in edge tracks from bottom to top. To reduce exposure to dangerous winds, the panels can be drawn down in a few minutes by rollers.

The assembly is designed to meet city codes for a 300-psf live load and a three-second wind gust of 98 mph. “It was wind-tunnel-tested to failure at 140 miles per hour, and it was the test-sample support structure that failed. It wasn’t the envelope,” says Peter Sjolund, the ESRT’s senior vice president of construction. “You are on the top of the Empire State Building, the most famous office building in the world. You don’t want to be on ‘film at 11.’ ” “The planning of the project took two years, including six months to design the cocoon and [perform the wind] testing in Florida,” says Tom Durels, ESRT’s executive vice president and director of leasing and operations. “That gives an idea of the amount of thought and engineering that went into it.”

Article by ENR. Read its entirety here – ENR

This Past April, 21 States Added Construction Jobs


An Associated General Contractors of America analysis of Department of Labor data found that 21 states added construction positions between March and April, a four-state uptick compared to last month. Like March, 39 states added construction jobs year over year.

The persistent skilled-labor shortage is still keeping employers from reaching their staffing goals. AGC Chief Economist Ken Simonson said in a release that there is plenty of work out there, so the lack of hiring is a result of the low labor supply. He said that unless the size of the workforce increases, employers will be forced to rework schedules to accommodate the tight labor conditions.

The AGC has once again called upon U.S. lawmakers to beef up career and technical education programs and pass the new Perkins Act, which provides funding for those initiatives. The legislation would also give local school officials more leeway in designing technical programs so that they can better meet local workforce challenges and demands. Article by ConstructionDIVE

Construction of International Bridge Begins in 2018


Could you imagine it? Crossing into Canada on a bridge?! It sounds futuristic, but construction of this international bridge plans to start in the summer of 2018 between the cities of Windsor, Ontario and Detroit, Michigan, according to MLive.

Since its beginnings in 2015, land aquisition has been the main focus up until now.

State Rep. Stephanie Chang, D-Detroit, who serves on a community advisory committee for the project, said Friday she’s focused on making sure the Delray community in southwest Detroit is treated fairly.

“Some people already have been relocated, but we’re pushing for additional optional buyouts for those outside the footprint and right next to the service drive, that may be impacted,” she said.

Today, they estimate the bridge itself will take about 4 years to complete with a construction cost over $2 billion, but officials with the Windsor-Detroit Bridge Authority touted progress during its annual meeting Friday at the Michigan Outdoor Adventure Center on Atwater in Detroit, as well as the Mackenzie Hall Cultural Centre in Windsor – The Detroit News

Even though the construction will take years and the populas won’t get to drive on this bridge until 2023 (added a year because we all know how construction can go) the people of Detroit should still get their passports and brush up on some of their French. Tourism, trade, and employment will all rise thanks to this new international bridge.

Excavator Parts

Excavator parts are manufactured by leading brands to meet excavation demands of various industries. Excavations call for digging out tons of soil from the earth’s surface to discover important minerals, stones and other important resources for human development and consumption. Heavy machinery and equipment that are high on performance, power and durability are employed for this purpose. These have special excavator parts like propel motors, steering boxes, swing motors, swing gear boxes, etc. that are supplied by Construction Equipment Parts Co.

It is only possible for huge corporations with extensive manufacturing facilities to support and create innovative machinery for excavation purposes. Hitachi, John Deere, Komatsu, Cat, Daewoo, Liebherr, Gallion, etc. are some names of such manufacturers who have embraced ground breaking technologies to come up with some of the most uniquely designed excavator machineries and parts with advanced functionalities to help tackle and perform even in challenging conditions.

Construction Equipment Parts Co., a well known supplier of OEM replacement parts for construction, municipal, mining, forestry and agricultural industries works in close co-ordination with most of these leading manufacturers to supply heavy equipment, machineries and replacement excavator parts. Apart from maintaining huge stock of various brands, the company also has an extensive dealer network to be able to serve its clients better in a prompt and professional manner.

John Deere Parts

John Deere is an American Corporation that is a well known manufacturer of heavy equipment required in agricultural, construction, mining, forestry and other such industries. Founded in 1837, the company has seen massive changes in the industrial scenario globally. It has adapted to the changing needs of various industries and come up with innovative products embracing state-of-the-art technologies.

The company is committed to the principles of integrity, quality, commitment and innovation. Their strategy for success for so many years has been to relentlessly understand and serve the needs of those who transform and enrich the land. They contribute to primary production processes of various countries. Their operations have spread over to Europe, Brazil, Russia, India, China apart from United States of India and Canada. John Deere parts are also available with Construction Equipment Parts Co., a well known supplier of OEM replacement parts for construction, municipal, mining, forestry and agricultural industries.

John Deere fulfills its commitment through an efficient network of suppliers and dealers that they choose with prudence. The company opts to create relationships and partner with those who share their work ethics looking forward to mutually beneficial associations by being a dealer, supplier or manufacturer of a John Deere licensed product.

Komatsu Parts

Komatsu Ltd. is the second largest manufacturer and supplier of earth moving equipment that serves the construction, mining and compact construction industries for nearly a century. They also produce heavy machinery for the forklift and forestry industries. They supply latest machines and state-of-the-art parts through a widespread distributor network and have a service program as a support function for all its products. Their products are built with latest technologies that are constantly upgraded with innovations taking place.

Hydraulic Excavators, dozers, wheel loaders, electric and mechanical trucks, motor graders, forklifts, articulated dump trucks, rigid dump trucks, motor graders, hydraulic shovels, etc. are some of the equipment manufactured by Komatsu for excavation and mining industries. They also produce specialized machinery for forestry like wheeled harvesters, forwarders, track feller bunchers, track feller harvesters and harvesting heads. Some of their specialty products include machines and special attachments for waste, material handling and other such applications.

Construction Equipment Parts Co., a well known supplier of OEM replacement parts for construction, municipal, mining, forestry and agricultural industries also deal in Komatsu parts. They have ready stock of machinery and equipment from this brand.