Shaft Design – Below Fixity Point.

Document Information

Document Type: FAQ

Product(s): LEAP RCPier

Version(s): All

Original Author: Bentley Technical Support Group -VM

QUESTION: How the program is calculating the  Pu load under Shaft Design – Below Fixity Point?


RCpier program is applying the impact to the drill shaft which is above the soil and is analyzed and designed as Column. 

h1 value is below the ground and H-h1 is the value between the bottom of the column and top of the ground. H-h1 value is used in the frame action to calculate the moment on drill shaft and anything below the ground is designed only for the gravity load.

 Program is picking the Fy value of 2266 kips from the Analysis TAB.

At the bottom of the shaft the program is calculating the Area and finally the

weight of the shaft for that height and the value is multiplied with appropriate load factor and finally added to Fy value to get the final Pu value.