Double-decked bridges typically consist of various materials including steel, concrete, and sometimes reinforced composites. The superstructure often utilizes steel beams or trusses for strength, while concrete is commonly used for the deck and supports. Additional materials may include asphalt for road surfaces and protective coatings to prevent corrosion. The choice of materials depends on factors like load requirements, environmental conditions, and design specifications.
The harmful effects of materials that are invented by technology are materials that are not biodegradable. This is because the materials are synthetic materials and cause destruction to the environment.
Raw materials
The materials used to make cement are,Calcareous materials (limestone)Argillaceous materials (clay)gypsumCoal dustIron oxidemagnesiumAlkalies
you obtain genetic materials from your parents organisms.
Cardboard, metal,wood and other strong materials
who are rubt briges sons name
she is old
She not died got it
pooh
Malcolm Hall
Briges
Yes!aduh!
thay were 30 in 2010
Ruby Bridges is not dead.
an engineer
people build briges
there are 30 briges according to my information