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23. A common problem in masonry walls is efflorescence. Which of the following condition/conditions must be present for efflorescence to occur? a. presence of salt in the wall b. extremely low humidity c. exposure to water d. contact of water with salt
25. Which of the following are characteristic(s) of platform frame construction? a. stud walls are used with platform framing b. Post and panel walls are used with platform framing c. Frame walls are erected on platform framing d. The most common method of wood frame construction is platform framing