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2. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   Standing seam metal roof. A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope. The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.

3. Truss - Wikipedia

   en.wikipedia.org/wiki/Truss

   A bowstring truss is used on the oldest metal bridge in Virginia. Named for their shape, bowstring trusses were first used for arched truss bridges, often confused with tied-arch bridges. Thousands of bowstring trusses were used during World War II for holding up the curved roofs of aircraft hangars and other military buildings. Many variations ...

4. Rooftop solar power - Wikipedia

   en.wikipedia.org/wiki/Rooftop_solar_power

   A rooftop solar power system, or rooftop PV system, is a photovoltaic (PV) system that has its electricity -generating solar panels mounted on the rooftop of a residential or commercial building or structure. [1] The various components of such a system include photovoltaic modules, mounting systems, cables, solar inverters battery storage ...

5. Charleston church shooting - Wikipedia

   en.wikipedia.org/wiki/Charleston_church_shooting

   The Charleston church shooting, also known as the Charleston church massacre, was an anti-black mass shooting and hate crime that occurred on June 17, 2015, in Charleston, South Carolina. Nine people were killed, and one was injured, during a Bible study at the Emanuel African Methodist Episcopal Church, the oldest black church in the Southern ...

6. Hix-Blackwell House - Wikipedia

   en.wikipedia.org/wiki/Hix-Blackwell_House

   The front slope of the metal, gable roof is pierced by three pedimented, gabled dormers. The main entrance, which is centered, has double doors, sidelights, and transom. A porch which extended across the facade was removed and replaced by a gabled portico in the 1920s." Hix-Blackwell House front door showing 19th c. decorative fretwork

7. Open web steel joist - Wikipedia

   en.wikipedia.org/wiki/Open_web_steel_joist

   In structural engineering, the open web steel joist (OWSJ) is a lightweight steel truss consisting, in the standard form, of parallel chords and a triangulated web system, proportioned to span between bearing points. The main function of an OWSJ is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to ...