Below are some examples which pile sizes are the most common choices for each application:
For terrace use the most common screw pile length is 1.20m, assuming that the terrace is built quite near the soil surface level (approx. 0-30cm from the ground). Using a longer screw pile is recommended if the construction level is significantly higher than that.
GARAGES / SHEDS:
For garage / shed applications the most common pile size is usually 1.70m.
There are occasions when the structure is very light and the 1.20m long screw pile will do as well.
Example calculation for needed piles
An example calculation for foundations for the terrace above:
8 x Screwpiles ECO 1,2m
8 x L1 Bracket
Terrace size: 40m2
Price: 504,00€ (excl shipping)
Price/m2 for foundations 12,60€
The edge of the terrace can be anchored to the building itself, thus piles are needed only to support the middle part and the far end.
The pile used on most cases is the 1,20 m screwpile.