CLARIFICATION PLEASE:
I HAVE A CLEAR SPAN OF 56 M BUILDING FOR WHICH ROOF IS INCLINED AT A SLOPE OF 33 DEGREES WITH INCLINED ROOF RAFTERS 1 AND 2
I HAVE APPLIED DEAD LOAD AND LIVE LOAD ON INCLINED ROOF AS FOLLOWS
LOAD CASE 1 DEAD LOAD
MEMBER LOAD
1 2 UNI GY 1.5
LOAD CASE 2 LIVE LOAD
MEMBER LOAD
1 2 UNI GY 3.5
I FIND THE REACTIONS AS FOLLOWS
TOTAL DEAD LOAD REACTION= 84
TOTAL LIVE LOAD REACTION=233.7
AS PER DEAD LOAD REACTION UNIFORM DEAD LOAD IS APPLIED ON HORIZONTAL PROJECTION=56 X 1.5=84
HOWEVER SAME WAY REACTION FOR LIVE LOAD SHOULD HAVE BEEN=56 X 3.5=196. BUT IT SEEMS IT HAS CONSIDERED INCLINED LENGTH WHICH IS 56/COS(33).
WHY IT HAS CONSIDERED INCLINED LENGTH AS THE LOAD IS APPLIED GLOBAL Y AXIS DIRECTION AND LIVE LOAD IS APPLIED ALWAYS ON HORIZONTAL PROJECTION?
PLEASE CLARIFY.