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    Spherical nickel sulfide inclusion ball

    A rare impurity known as a nickel sulfide inclusion is a tiny metallic ball that grows over time with sufficient force that it can catastrophically shatter tempered glass. This is what nickel sulfide inclusions look like.

    g3-check-pressure-gauge.jpg

    Before building the actual building, the best projects include the construction of a project specific mockup for testing. Here is a look inside some of the best labs in the USA.

    Willis Tower and 311 S. Wacker, Chicago

    Original architectural background images from Chicago Window Expert.

    Phil Saineghi

    In memory of Phil Saineghi of J&D Erectors. Phil, his partner Nick Rossi and their team of Local 63 Ornamental Ironworkers literally built much of Chicago's world class skyline. Phil will be deeply missed by his family, friends and business associates.

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Photo of the day

c1-tyvek-and-flashing.jpg
The top of the wall has a strip of plywood sheathing for better attachment of the panels. Then the sheathing is covered with rubberized membrane at top and bottom edge and Tyvek along the field.