two - inch - high steps in walkways\nare better than a sloped surface because of drainage issues\nare more…

two - inch - high steps in walkways\nare better than a sloped surface because of drainage issues\nare more desirable than a few larger steps\nrequire a railing if there are more than three steps in a row\nmay be hard to see\nshould have a maximum tread width of 12 inches\nquestion 18\nall of the following are types of retaining walls except\ngravity\ncantilevered\npile\ntied back\ncavity

two - inch - high steps in walkways\nare better than a sloped surface because of drainage issues\nare more desirable than a few larger steps\nrequire a railing if there are more than three steps in a row\nmay be hard to see\nshould have a maximum tread width of 12 inches\nquestion 18\nall of the following are types of retaining walls except\ngravity\ncantilevered\npile\ntied back\ncavity

Answer

Answer:

(First question) D. may be hard to see (Second question) E. cavity