Dear Sir/Lady

I have confronted with problem in a line connected to drip lag side of a tower.
as you see in below a 14" line be connected to a end cap of mentioned drip leg with size 24". In the project PMS has been mentioned to reinforced pad for this connection type but it is for tee branches and we don't know that is it suitable for drip leg connection or not. On the other hand i want to know how can we calculate the SIF for this connection.