Fac in CAESAR II
Fac in CAESAR II
(OP)
I am doing a analysis for the underground pipeline and I have few soil data.
I will use the following soil data:
friction angle : 27
density: 1.8 kg/m3
coeff. friction: 0.2
Soil : sand
OCM:6
I specified
ALLOWABLE STRESSES
B31.4 (2002) Eff= 1.0000 Sy= 241,316 KPa Fac= .5
I need to know what is the common Fac used for ANSi B 31.4 allowable stresses.
I need to Know what is the common factor for the soil.
I want to Know what is the temperature change indicated in the soil data.
thanks and excuse me for my english. I write litlle english.
I will use the following soil data:
friction angle : 27
density: 1.8 kg/m3
coeff. friction: 0.2
Soil : sand
OCM:6
I specified
ALLOWABLE STRESSES
B31.4 (2002) Eff= 1.0000 Sy= 241,316 KPa Fac= .5
I need to know what is the common Fac used for ANSi B 31.4 allowable stresses.
I need to Know what is the common factor for the soil.
I want to Know what is the temperature change indicated in the soil data.
thanks and excuse me for my english. I write litlle english.





RE: Fac in CAESAR II
Richard Ay
COADE, Inc.
RE: Fac in CAESAR II
I run the buried model with FAC blank, but in the CAESARS'Quick reference guide for B31.4 indicate:
1- If FAC = 1 (fully restrained pipe)
2- If FAC= 0.001 (buried, but soil restraints modeled)
3- If FAC=0.0 (fully above ground)
I use the case 2.
however, if I write FAC = 0.001 the program simulates a case with almost no restrictions on the ground.
If I leave FAC blank on the results in the code compliance indicate that dont done code compliance.
againb thanks.
RE: Fac in CAESAR II
As you stated above, you have 3 conditions. If you use the buried pipe modeler let CAESAR II set FAC and live with it. If you're overstressed change the piping layout.
Richard Ay
COADE, Inc.
RE: Fac in CAESAR II
This pipeline aren´t overstressed , but i want to make the calculation memory and i must to write this FAC.
the data in this memory.
Thanks again