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2. Flat roof - Wikipedia

   en.wikipedia.org/wiki/Flat_roof

   A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10°. [1] Flat roofs are an ancient form mostly used in arid climates and allow the roof space to be used as a living space or a living roof. Flat roofs, or "low ...

3. Permeable paving - Wikipedia

   en.wikipedia.org/wiki/Permeable_paving

   Permeable interlocking concrete pavements are concrete units with open, permeable spaces between the units. [ 28 ] : 2 More recently manufacturers have introduced styles with smaller joint allowing for better ADA compliance and still capturing a significant amount of stormwater.

4. Precast concrete - Wikipedia

   en.wikipedia.org/wiki/Precast_concrete

   Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels, floors, roofs, and piles.

5. Replace Your Old Driveway with One that Sucks (Water)

   www.aol.com/2010/01/28/replace-your-old-driveway...

   For premium support please call: 800-290-4726 more ways to reach us

6. Waffle slab - Wikipedia

   en.wikipedia.org/wiki/Waffle_slab

   Waffle slabs are preferred for spans greater than 40 feet (12 m), because, for a given mass of concrete, they are much stronger than flat slabs, flat slabs with drop panels, two-way slabs, one-way slabs, and one-way joist slabs. [2] Section of a waffle slab including beam, ribs, and column head

7. Driveway - Wikipedia

   en.wikipedia.org/wiki/Driveway

   A driveway (also called drive in UK English) [1] is a private road for local access to one or a small group of structures owned and maintained by an individual or group. Driveways rarely have traffic lights , but some may if they handle heavy traffic, especially those leading to commercial businesses or parks.