To sustain loads, a solid structure employs solid building materials. A solid construction often has a high mass. A well-built, sturdy structure can survive for a long time. Solid structures include a concrete dam, a wooden telephone pole, and a marble statue.
Concrete is a solid material that can be made into any shape you like. Concrete structures are strong, lightweight, and durable. They can also be easily colored or decorated. Concrete structures include bridges, buildings, and walls.
Wood is a solid material that can be used to make many things. Wood structures are strong, stable, and attractive. They can also be painted or stained any color you like. Wood structures include fences, decks, tables, and chairs.
Marble is a solid material that is hard to break and easy to clean. Marble structures are very rare but some museums and monuments are made of this material. They look beautiful but are expensive.
So, wood, concrete, and marble are all solid materials. That means that their appearance does not change when they are worked on by people. The same thing applies to their realizations; once built, their purpose is clear to see.
A load-bearing item made of solid materials. The human body is a complex structure made up of solid, frame, and shell components. A frame structure is a network of interconnected pieces that sustain loads. Shell Construction: A hollow, curving structure that gives exceptional strength and stiffness. Bones are a major component of the skeleton; they provide the structural support for the body's organs and muscles. They are also where certain hormones are produced (such as estrogen) and cells grown for transplant (such as bone marrow). The bones consist mainly of calcium carbonate (calcite), with some magnesium and phosphorus added as phosphates. Their hardness is due to their crystal structure. Cartilage is used instead in areas such as ears and nose where there is no need for strong bones. It can't take any weight or stress so it can't be part of the skeletal system. Muscle attaches to bones at joint spaces called articulations. You have movable joints where muscle connects to bone: shoulders, hips, elbows, and knees. There are fixed joints where bone meets bone: skull, sternum (breastbone), pelvis (sacrum and coccyx).
The spinal column is made up of vertebrae and discs. Vertebrae are the bones of the spine.
Structures that are solid Solid structures include rocks, bricks, and cement poles. They are not made up of separate components with gaps between them. A rock has many small holes inside it that water fills up. This is why you often see "rocks" when viewing land from above; because they don't appear to be solid objects. Brick and cement structures are called solid structures because there are no spaces inside them for water to fill up.
All structures deteriorate over time due to heat, cold, wind, rain, snow, ice, insects, animals, humans, etc. The type of material they are built of affects how much damage they can take before needing replacement or renovation. For example, iron structures such as bridges and buildings are very susceptible to insect damage, while wood structures such as homes are more likely to suffer damage from heavy loads or extreme temperatures. Debris on the ground beneath a bridge may indicate that it is about to collapse. A structural engineer should be consulted to determine the best way to repair or replace the bridge.
All structures have strength limitations that must be considered when designing them. For example, a bridge must have enough width to support its load, and length as required by its use. It cannot be too narrow or it will not be able to handle any traffic.
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