Hello
The building plot for our single-family house (living area 120 m2 (1,292 sq ft)) is small (400 m2 (4,306 sq ft)) and there is a height difference of 1 m (3.3 ft) over 15 m (49 ft), which corresponds to a slope of 6.6%. We are not planning a basement, and the question is what type of foundation we should use. Of course, the structural engineer will have to calculate everything in the end, but I would like to hear your experiences with sloped sites and get a sense of whether the slope will require significant additional investment.
If a retaining wall needs to be built, is a slab foundation necessary, or would strip footings be sufficient? Could strip footings also serve as the retaining wall?
Thank you.
The building plot for our single-family house (living area 120 m2 (1,292 sq ft)) is small (400 m2 (4,306 sq ft)) and there is a height difference of 1 m (3.3 ft) over 15 m (49 ft), which corresponds to a slope of 6.6%. We are not planning a basement, and the question is what type of foundation we should use. Of course, the structural engineer will have to calculate everything in the end, but I would like to hear your experiences with sloped sites and get a sense of whether the slope will require significant additional investment.
If a retaining wall needs to be built, is a slab foundation necessary, or would strip footings be sufficient? Could strip footings also serve as the retaining wall?
Thank you.
B
blackarrow199010 Apr 2021 12:39This is not possible due to the zoning plan; we can only shift the house slightly left, right, or down. An 80–90 cm (31–35 inch) difference may not seem like much, but if at least 80 cm (31 inches) of ground depth is required, then we have a minimum of 1.60 m (5 feet 3 inches) of foundation. I am not sure if strip footings would be feasible in this location. The second option would be to fill the difference and build a retaining wall if necessary, especially since the parking spaces need to be as level as possible.