fxp
This is the way I understand it.
AISC ASD limits plastic design to steels with yield strength up to 65ksi.
Example #1(36ksi material) had a f'y greater than 65 which is wht the column had a dash (-) instead of a number. You will notice there is no number greater than 65.
If the f'y had been...
apsix
A factor of safety of 3 (breaking strength/working load) is a resonable number for wire rope used for a guy supported structures.
The turnbuckle and all the rope hardware should have atleast the same capacity as the rope.
jike
I agree with you. 7'-6" seems just fine for a starting point. I would assume that the overall size of the structure will be governed by the platform geometry and then the members will be sized for the wind and D.L.
asixth:
I don't know what "designing the cage to LSD" means so what I say may not apply. So for what it is worth;
ASME B30.20-1999 "Below-the-Hook Lifting Devices"
Chapter 20-1 Structural and Mechanical Lifting Devices
"The load bearing structural components of a lifter shall be designed to...
bnrg
I don't have ASME BTH-1-2005, but I think they are saying that the member is loaded in a manor that causes the member to bend about it's strong axis, not that the load is acting in that direction.
"loaded in the plane of the minor axis" means the the load is acting in the "y" axis causing...
jaydees
I have always interpreted the meaning of (z) to be the height where you apply the wind force.
If you have a 40ft tank, your velocity pressure (qz) varies with height.
At 20ft (z) = 20, at 40ft (z) = 40.
This gives you a different velocity pressure exposure coefficient (Kz) at different...
I have a 1" diam. bridge strand that is being used as a guy cable that needs to be pre-tensioned to 23,500 lbs.
Because of the connection geometry, I need to grab the 1" bridge strand and pull it up to the pre-tension load.
I have searched and found Klein Tools - Chicago Grips, but they seem to...
cdi12
We use Galvanized Bridge Strand for the guy ropes on our Stacks which are pre-stretched by the manufacture to eliminate most of the construction stretch.
The initial pretension that we use is nominally 4.5% of the breaking strength with a minimum of 2.5% in the most unfavorable cold...
