[Tower-Speak] How to calculate rigging loads when raising a tilt base tower?

[Ray LaRue]

I am in a fairly new (to me) QTH and I need to install my 64' hinged 
base, aluminum tower with a Moseley CL36 next to the house.

I have previously put it up with a 16' section of tower mounted along 
side on the ground next to the tower base, used as a gin pole.  But in 
this installation I cannot do that.  I am going to have to use the house 
roof structure to pull the tower up.

I am now 73 years old and I really don't want to climb my tower much any 
more.  So, I would also like to hinge mount the beam to be horizontal 
while the tower is down and have it adjust horizontally to the tower, 
when it is up..

The tower weighs about 12 to 14 lbs per 8' section (14" and 18" face 
sections).  The beam weighs about 65 lbs.  The tower itself will easily 
raise this way with it's own weight and the beam's, without distorting, 
bending or breaking.

My problem is I don't know how to calculate the stresses that the 
rigging and the mounting hardware to the house, will have to bear while 
the tower is being raised.

I plan to attach the rigging 13' up the tower and at the same height, 
underneath the roof rafters of the house.  I have the ability to brace 
the attachments on into multiple rafters in the attic.

I will use a motorized winch to pull the tower up.  The load rating of 
that winch and associated attachments and cables, will be an important 
consideration.

I have not been able to find a formula or calculation on how the loads 
at the upper parts of the tower accumulate or bear, on the rigging at 
the attachment point.

I purchased the ARRL's latest tower book but do not find it helpful for 
an application such as mine.

My question:  Does anyone know how to calculate the rigging loads.  This 
will also help me to estimate the stresses for the needed hardware and 
attachments to my roof.

Your attention and assistance is appreciated.

Ray, W4BYG
Cleveland, TN