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2. Exorcist steps - Wikipedia

   en.wikipedia.org/wiki/Exorcist_steps

   The Exorcist steps in Georgetown, Washington, D.C.. The Exorcist steps are concrete stairs, continuing 36th Street, [1] descending from the corner of Prospect St and 36th St NW, down to a small parking lot, set back from the intersection of M Street NW, Canal Rd NW, and Whitehurst Freeway NW in the Georgetown neighborhood of Washington, D.C., famous for being featured in the 1973 film The ...

3. Downdraft table - Wikipedia

   en.wikipedia.org/wiki/Downdraft_table

   Downdraft tables or downdraught benches are workbenches with built-in ventilation to capture dust, smoke, and fumes and draw them away from the operator and the material being worked on. [1] They typically consist of a perforated surface whose underside is connected to a ventilation or dust collection system, to draw material through the holes ...

4. Bill Booth - Wikipedia

   en.wikipedia.org/wiki/Bill_Booth

   The company's first harness/container system was the Wonderhog in 1974. This was followed by the Wonderhog Sprint and in 1980 by the Vector. The U.S. Skydiving Team wore the first Vectors at the 1981 World Meet. The Vector II followed six years later. In 1983, Booth received the Parachute Equipment Industry Association Achievement Award.

5. Caisson (engineering) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(engineering)

   Ventilation filtration systems: The word caisson is also used as a name for an airtight housing for ventilation filters in facilities that handle hazardous materials. The housing usually has an upstream compartment for a pre-filter element and a downstream compartment for a high-efficiency filter element.

6. Movable scaffolding system - Wikipedia

   en.wikipedia.org/wiki/Movable_scaffolding_system

   A movable scaffolding system (MSS) is a special-purpose self-launching form used in bridge construction, specifically prestressed concrete bridges with segments or spans that are cast in place. The movable scaffolding system is used to support a form while the concrete is cured; once the segment is complete, the scaffold and forms are moved to ...

7. Insulating concrete form - Wikipedia

   en.wikipedia.org/wiki/Insulating_concrete_form

   For Post and Lintel System ICFs, the concrete has a horizontal member, called a lintel, only at the top of the wall (Horizontal concrete at the bottom of the wall is often present in the form of the building's footer or the lintel of the wall below.) and vertical members, called posts, between the lintel and the surface on which the wall is ...

8. Lift slab construction - Wikipedia

   en.wikipedia.org/wiki/Lift_slab_construction

   Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...

9. Rear-inflow jet - Wikipedia

   en.wikipedia.org/wiki/Rear-inflow_jet

   The rear-inflow jet is a component of bow echoes in a mesoscale convective system that aids in creating a stronger cold pool and downdraft. The jet forms as a response to a convective circulation having upshear tilt and horizontal pressure gradients. The cold pool that comes from the outflow of a storm forms an area of high pressure at the surface.