Pressed Piling:

Pressed Piling
Advantages:
- No waiting fo concrete cure
- Minimum traffic around landscaping
Disadvantages:
- No tests of on-site soil.
- Pilings are shallow under light weight houses and may not reach stable soil.
- No steel reinforcement in cylinders or cap.
- No pre-test of piling cylinder concrete strenght.
- Cylinders broken during driving cannot be seen.
- Piling installation force may damage house.
- Adding or changing location of bookcases or heavy appliances may cause foundation movements.
- Unconnected piling cylinders cannot resist uplift.

Pressed Piling with Insert
Pressed Piling with Insert
Advantages:
- No waiting fo concrete cure
- Minimum traffic around landscaping
- Cable or rebar insert during driving helps aligment; no benefit if inserted afterward
Disadvantages:
- No tests of on-site soil.
- Pilings under light houses and may not reach stable soil depth.
- No reinforcing steel in cylinders or cap.
- No test of piling cylinder concrete strenght.
- Cylinders broken during driving cannot be seen.
- Piling driving force may damage house.
- Changing location of bookcases or heavy appliances may cause foundation movements.
- Piling misalignment cannot be detected.
- No final inspection by enginerr or city.
- Water flowing down the central hole weakens the soil.
Bell Bottom Pier Method
Advantages:
- Soil tested on site down 15 feet deep for strength and condition
- Size of bell and depth of shaft can be customdesigned for the house
- Shape, size, and depth of bell and angle of shaft can be inspected
- Three 1/2″ rebars in shaft
- Concrete strength special ordered for each house
- Two layers of steel in cap
- Large bell-bottom gives solid support
- Bell-bottom anchors against uplift
- No damaging forces on house during instalation
- Owner can furnish and update the house in the future without concern for the fundation
Disadvantages:
- Waiting time required to allow concrete to gain full strength
- Improper construction will affect performance
