See the following table for maximum piling length and structural loads recommended without conducting a detailed structural analysis. Many soils are not capable of developing these maximum loads. Before final structural design, conduct foundation design using site specific soil information to verify the ability of subsurface to provide resistance to the loading.

Table 5-2: Maximum Allowable Precast Concrete Pile Service Loads

Size	Maximum Length	Abutments and Trestle Bents	Footings (per Pile)
16 in. Square	85 ft.	75 ton	125 tons
18 in. Square	95 ft.	90 tons	175 tons
20 in. Square	105 ft.	110 tons	225 tons
24 in. Square	125 ft.	140 tons	300 tons