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Zinsco would remain with copper in both their panels and breakers until the third major copper shortage in the early 1960s, when they would switch to an aluminum bus. In 1963, Zinsco introduced the R-38 twin breaker, which was the only twin circuit breaker that also made contact on both bus-bars for 240 volts in a single breaker space.
Within county Donegal this was originally termed the Mica scandal in 2011, which is the point at which homes and other buildings began showing signs of cracking and decay. [2] The term "mica scandal" arose because the expert committee had observed that defective concrete blocks within County Donegal contained excessive quantities of the mineral ...
Degraded concrete and rusted, exposed reinforcement bar (rebar) on Welland River bridge of the Queen Elizabeth Way in Niagara Falls, Ontario. Concrete degradation may have many different causes. Concrete is mostly damaged by the corrosion of reinforcement bars due to the carbonatation of hardened cement paste or chloride attack under wet ...
Sulfate attack typically happens to ground floor slabs in contact with soils containing a source of sulfates. [2] Sulfates dissolved by ground moisture migrate into the concrete of the slab where they react with different mineral phases of the hardened cement paste. The attack arises from soils containing SO 2−
A group of lawmakers recently toured homes in Greater Gardner affected by crumbling foundations caused by pyrrhotite. What they said.
Collapsed barn at Hörsne, Gotland, Sweden Building collapse due to snow weight. Structural integrity and failure is an aspect of engineering that deals with the ability of a structure to support a designed structural load (weight, force, etc.) without breaking and includes the study of past structural failures in order to prevent failures in future designs.
The price of home insurance has skyrocketed to an average of $2,285 a year. But smart homeowners can save up to $980 a year – here’s how This article provides information only and should not ...
Residents living on the second, third and fourth floors of the Jacksonville complex came home on October 3rd to find a notice posted on their front doors laying out their options. It read, in part ...