Carpenter Red Seal Exam Prep · Question
A carpenter is setting up for a new commercial building on a sloped site. The blueprint indicates a finished floor elevation (FFE) of 135.250 m at gridline A-1. The surveyor's benchmark (TBM) is established at 136.500 m. If the top of the foundation wall is to be 0.150 m below FFE, what is the required cut/fill measurement at the TBM to establish the top of the foundation wall elevation?
Finished foundation wall elevation = FFE - 0.150 m = 135.250 m - 0.150 m = 135.100 m. The difference from TBM = TBM - Foundation Wall Elev = 136.500 m - 135.100
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Question: A carpenter is setting up for a new commercial building on a sloped site. The blueprint indicates a finished floor elevation (FFE) of 135.250 m at gridline A-1. The surveyor's benchmark (TBM) is established at 136.500 m. If the top of the foundation wall is to be 0.150 m below FFE, what is the required cut/fill measurement at the TBM to establish the top of the foundation wall elevation?
Answer options:
- 1.400 m fill
- 1.100 m cut ✅ 1.400 m cut
- 1.100 m fill
Correct answer: 1.400 m cut
Explanation: Finished foundation wall elevation = FFE - 0.150 m = 135.250 m - 0.150 m = 135.100 m. The difference from TBM = TBM - Foundation Wall Elev = 136.500 m - 135.100 m = 1.400 m. Since TBM is higher, it requires a cut.
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