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...
I'm not familiar with wood design but it looks like UBC 1997 has a Table 23-II-B-1 -Nailing Schedule and a separate Table 23-II-B-2 -Wood Structural Panel Roof Sheathing Nailing Schedule.
The IBC 2003 seems to have combined the two into one Table 2304.9.1 - Fastening Schedule.
Connection number...
STR04
Since no one answered you,I'll give it a try.
This is the way I read it;
Eq.7-1 Flat Roof Snow Load:
pf = 0.7(Ce)(Ct)(I)(pg) where pg = 50psf
but not less than 20(I)
Your slope(hip roof) is 14.03 deg. which is greater than (70/W) + 0.5 = 7.5
Therefore use Eq. 7-2 Sloped Roof Snow...
DSB123,
I checked to make sure my Dyslexia haddn't kicked in, it IS API 560 Section 5 that lists allowable nozzle loads. Once in a while one of our clints will requests that our nozzles be designed to these load.
I just thought this may be of some use for jcfoley.
