Design Calculation of Pile Cap

may 07, 2020

Pile Cap of Two Piles:

Here, Pile value of 18 in diameter, 55 ft long, pile load is 80 kips, and 105 kips on column.
                                                                                             

Plan of Pile Cap

• Step 1: Moment

          Load on each pile = 105/2 =52.5 kips

          M = 52.5 × (2.25-.5) = 92 

• Step 2: Depth

     

• Step 3: Steel

• Step 4: Shear

Provide, ø 10 mm @ 6.5 in c/c

Section of Pile Cap

 Main bar (Bottom) marked (a) 7 - 20 mm dia
Stirrup bar marked (b) 10 mm dia (2-leg) @ 6.5" c/c.
Top bar marked (c) 6 - 12 mm dia.

Pile Cap of Three Piles:

Here, Pile value of 18 in diameter, 55 ft long, pile load is 80 kips and 220 kips on column.

Pile Cap of Three Piles

• Step 1: Moment

          Load on each pile = 74 kips

          M = 74× (1.9167’) = 142 

• Step 2: Depth

• Step 3: Steel

• Step 4: Shear

Plan of Pile Cap

Section of Pile Cap

 Mail bar (Bottom) marked (a) 8 - 20 mm diameter
Top bar marked (b) 1 -12 mm diameter at each corner
Stirrup bar marked (c) 10 mm diameter @ 6" c/c.