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2. A-Jacks - Wikipedia

   en.wikipedia.org/wiki/A-Jacks

   For example, rock can weigh between 150-175 lb; [2] a suitable rip-rap boulder comparable to a 96 inch A-Jacks unit (about 36 c.f.) would weigh about 5800 pounds, about 16% more than the A-Jacks unit. A-Jacks also have the advantage of being interlocking and self-stabilizing.

3. Lift slab construction - Wikipedia

   en.wikipedia.org/wiki/Lift_slab_construction

   Once the slabs have been raised to their desired height the lifting collars are welded to the columns, along with shear blocks to support the slab from beneath. To assure the security of a structure during the raising of the slabs, the hydraulic jacks, attached to the top of the columns, use synchronized consoles to lift the slabs at an even ...

4. Glossary of North American railway terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_North_American...

   A unit train, also called a block train or a trainload service, is a train in which all cars (wagons) carry the same commodity and are shipped from the same origin to the same destination, without being split up or stored en route. [244] [circular reference] UP (US) The common name and reporting mark for the Union Pacific Railroad [245]

5. Jack (device) - Wikipedia

   en.wikipedia.org/wiki/Jack_(device)

   A scissor jack use the mechanical advantage of a leadscrew and 4-bar linkage to allow a human to lift a vehicle by manual force alone. They are inexpensive and are common in manufacturer-supplied breakdown kits. The jack shown at the left is made for a modern vehicle and the notch fits into a jack-up point [3] on a unibody. Earlier versions ...

6. Concrete leveling - Wikipedia

   en.wikipedia.org/wiki/Concrete_leveling

   In civil engineering, concrete leveling is a procedure that attempts to correct an uneven concrete surface by altering the foundation that the surface sits upon. It is a cheaper alternative to having replacement concrete poured and is commonly performed at small businesses and private homes as well as at factories, warehouses, airports and on roads, highways and other infrastructure.

7. How weight loss could tip America's economic scales - AOL

   www.aol.com/weight-loss-could-tip-americas...

   What Weight-Loss Related Spending Shifts Could Mean for Affected Industries. As long-term weight loss becomes more of a reality for many Americans, it's clear that they're envisioning lifestyle ...