It's called a "portcullis"
A portcullis is "a grating of iron hung over the gateway of a fortified place and lowered between grooves to prevent passage."
Fiberglass grating is made to look similar to metal grates in industral use, but since it is made of fiberglass it is corrosion and impact resistant. Fiberglass grating has low electric and heat conductivity and can be made strong enough for fork lifts or even trucks to travel over.
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Pretty strong, tried it and coudn't break it. NOT as strong as duct tape
Yes concrete is very strong.
A portcullis is "a grating of iron hung over the gateway of a fortified place and lowered between grooves to prevent passage."
A portcullis is "a grating of iron hung over the gateway of a fortified place and lowered between grooves to prevent passage."
The name given to the strong heavy grating is a "manhole cover." It is a removable plate that is used to cover openings in streets or pavements to provide access to utility vaults below.
Rochester castle is strong because: it was made out of strong stone, it was hard forpeople to break into.
Fiberglass grating is made to look similar to metal grates in industral use, but since it is made of fiberglass it is corrosion and impact resistant. Fiberglass grating has low electric and heat conductivity and can be made strong enough for fork lifts or even trucks to travel over.
castle
The strong points of Arundel castle are the rounded corners because they have more surface area, the 9 feet thick wall surrounding the castle keep building built at the center of the Mott. This is the strongest part of the whole castle) and the 100 feet high Motte (a man made mound of earth.) Overall it is a very strong castle!!! :)
i dont no!
i dontknow
The portcullis.
sand.
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