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2. Block-stacking problem - Wikipedia

   en.wikipedia.org/wiki/Block-stacking_problem

   The first nine blocks in the solution to the single-wide block-stacking problem with the overhangs indicated. In statics, the block-stacking problem (sometimes known as The Leaning Tower of Lire (Johnson 1955), also the book-stacking problem, or a number of other similar terms) is a puzzle concerning the stacking of blocks at the edge of a table.

3. Eaves - Wikipedia

   en.wikipedia.org/wiki/Eaves

   Eaves overhang, shown here with a bracket system of modillions. The eaves are the edges of the roof which overhang the face of a wall and, normally, project beyond the side of a building. The eaves form an overhang to throw water clear of the walls and may be highly decorated as part of an architectural style, such as the Chinese dougong ...

4. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   [8] Double tees are the most common products for short spans up to 60 feet (18 m) Hollow-core slabs are used when there is a need for flushed ceiling. T-beams are similar to double tees but can be used for span ranging from 30 feet (9.1 m) to 100 feet (30 m). Joists and planks are combination of using prestressed joists with prestressed planks.

5. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   Monitor roof: A roof with a monitor; 'a raised structure running part or all of the way along the ridge of a double-pitched roof, with its own roof running parallel with the main roof.' Butterfly roof (V-roof, [8] London roof [9]): A V-shaped roof resembling an open book. A kink separates the roof into two parts running towards each other at an ...

6. Fascia (architecture) - Wikipedia

   en.wikipedia.org/wiki/Fascia_(architecture)

   Fascia (/ ˈ f eɪ ʃ ə /) is an architectural term for a vertical frieze or band under a roof edge, or which forms the outer surface of a cornice, visible to an observer. [ 1 ] Typically consisting of a wooden board, unplasticized PVC (uPVC), or non-corrosive sheet metal, many of the non-domestic fascias made of stone form an ornately carved ...

7. Covering (construction) - Wikipedia

   en.wikipedia.org/wiki/Covering_(construction)

   The roof underlayment is used to prevent accidental penetration of rainwater or powdery snow, to prevent convective exchanges with thermal insulation, and to control the migration of water vapor. [1] It is an element of the building's thermal performance. [2] The roof underlayment is placed between the frame and the roof support.