straw tower science!!!! by SHAYLEE WARREN https://padlet.com/98994/64xa1vpbqlbp a lengendary project en-us 2016-09-07 20:23:37 UTC 2026-01-08 16:25:00 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Growing.png 98994 https://padlet.com/98994/64xa1vpbqlbp/wish/122270752 The framing for a one-story or two-story structure may be constructed from 2-inch by 4-inch pieces of lumber, called 2-by-4´s. Heavier lumber is used for load-bearing joist headers over windows and doors, stair stringers, roof rafters, floor joists, and other supporting structures.       ]]> 2016-09-07 20:29:17 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/122270752 World War II brought a new era to building construction in the postwar years. Builders began using more power tools and equipment. The use of huge cranes eliminated the backbreaking work of moving bricks, mortar, and cement from floor to floor in high-rise buildings. Methods of prefabricating building components were developed so that many types of structural components, such as pre-hung doors and manufactured stairs, could be mass produced in factories and shipped to construction sites.  98994 https://padlet.com/98994/64xa1vpbqlbp/wish/122591569 2016-09-08 20:10:36 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/122591569 Most single-family houses are of standard-frame, lumber construction. Apartments and condominiums are often constructed of brick, concrete, or masonry. 98994 https://padlet.com/98994/64xa1vpbqlbp/wish/122592963 2016-09-08 20:16:39 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/122592963 The interior walls of many of the finer homes in the United States and other countries of the Western Hemisphere were once made of gypsum plaster. To make gypsum plaster, builders mixed plaster in powdered form with water and then applied this mixture over lath made of wire mesh or gypsum.Today drywall, or plasterboard, is most commonly used. It consists of pre-dried panels of plaster sandwiched between sheets of heavy paper or other facing material. Drywall sections are screwed or nailed directly to studs, and the seams between the panels are sealed with a joint compound and covered with a porous paper or vinyl tape to give a smooth surface to the finished drywall. Other interior panels are made of wood, plywood, or composition board. (See also plaster and wallboard.) 98994 https://padlet.com/98994/64xa1vpbqlbp/wish/122593100 2016-09-08 20:17:39 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/122593100 The pipes that can be installed for plumbing and heating and the wiring that can be used for electrical fixtures are controlled by local building codes. Pipes, for example, may be constructed only of galvanized steel or of copper, brass, or plastic tubing. 98994 https://padlet.com/98994/64xa1vpbqlbp/wish/122593186 2016-09-08 20:18:14 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/122593186 Several types of steel framing are used in the construction of light buildings. One example is wall-bearing framing, which allows the weight of a building to be carried on both its exterior and interior walls, as it is in residential houses. This method is used in buildings of three stories or less. 98994 https://padlet.com/98994/64xa1vpbqlbp/wish/122593331 2016-09-08 20:19:21 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/122593331 Credits: http://school.eb.com/levels/middle/article/273396  98994 https://padlet.com/98994/64xa1vpbqlbp/wish/122593449 http://school.eb.com/levels/middle/article/273396]]> 2016-09-08 20:20:10 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/122593449 98994 https://padlet.com/98994/64xa1vpbqlbp/wish/124477417 2016-09-16 20:03:40 UTC https://padlet.com/98994/64xa1vpbqlbp/wish/124477417