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Thanks Andrew, I've requested a few quotes to order the standard however none of the suppliers say they have it. Shortly after I posted someone did point out the appendix in A668. That should be good enough for what I need. Thanks for the help.

Blodgett Design of Weldments has some good (yet old) drum design examples. We use it in the crane industry on the occasion.

Hello, I need to find the material properties for a forging that was made to the ASTM A237 standard. I can't find a copy of it anywhere. Does anyone have a copy I could see? Thank you.

Hello, I need to lay a temporary crane rail down in an asphalt parking lot and plan to distribute the load using plate. I am trying to determine the usable plate width and needed thickness. I need to keep the stress into the asphalt below 3000 psf. Anyone know of a good reference for this...

Thanks for the responses. @itsmoked, thanks for the link, I did find them after looking. I usually grab my ring terminals off of McMaster or from a Fastenal and they didn't show any listed. @waross, they are referencing the blanket NEC section 110.12 which covers workmanship. It doesn't...

So this is an odd issue, one that only the Gov't could create. I landed new #12 wire on a terminal block using ring terminals. The terminal blocks were existing equipment and had #6 studs. The ring terminals I used are for 10-12 GA wire and have a #8 hole. I am being told by the Gov't that...

No, I'm using 3/4" bolts in 13/16" holes. My nearest edge is 1 1/4" away which should be fine according to Table J3.5.

Thank you both for the great responses. I never knew they gave a span on the tensile strength of material. The reference to minimum makes sense now. The chart SlideRuleEra referenced was helpful. Ingenuity: I am not very familiar with LRFD, my customers have always favored the ASD of the...

Hello, I am using AISC Steel Construction Manual 9th Edition attempting to assess a bolted connection in shear. The manual says under Chapter J page 5-74 that the allowable bearing stress for a standard hole with two or more bolts in line of force to use the below formula. Fp = 1.2Fu Fp is...

MikeHalloran You are correct there is a rain cap on the end however I've been told to ignore it for now. I'll explain the 6" to 10" connection briefly to see if your statement still holds. The exhaust starts out as 6" dia pipe then the pipe is fitted with a 10" to 6" reducing flange. Then a...

So the CFM I listed is at the inlet of the pipe section shown. The inlet is the bottom right connection. The exhaust flows up the first 10" pipe then hits the muffler which is 22" diameter with unknown internals. The only information I was given from the manufacturer was that I will see an...

Hello, I've been given a problem at work that is not in my area of expertise. I have been tasked with determining the output velocity or output flow of an exhaust system on a diesel generator. The diesel exhaust exits the manifold in a 6" diameter pipe that is connected to a 10" diameter...

Thanks to everyone who helped work out this equation. RolMec's last calculation looks like he accounted for all of the terms in the original German calc and confirms the calculation is correct. While the forum was tackling the German calc for me I was able to refine my boss's calc into a...

kjoiner, You are right the rope weight is 6.56 LB/FT and does start to add up however the time of drop for this application is very short and the added rope weight is negligible.

rb1957, Thanks for the reply, I will clear the air and attempt to explain myself. I tried to simplify the problem to avoid a long drawn out explanation, however I may have simplified it too much. The problem is a work related problem where we are fitting a disc brake to a hoist drum. The...

BUGGAR, Thanks for your productive input I always appreciate posters such as yourself..... If you would like to reference a specific book I would be glad to look it up, however this problem is not in any of my current references. Drawoh, You can ignore the sheave inertia and the efficiency is...

Hello, I'm trying to work out the acceleration of a drum as a load is dropped and need to account for mass moment of inertia. I've attached a free body diagram of the system. The load is instantaneously dropped causing the drum to un-spool wire rope as the load falls to the ground. Assume...

Buggar: This is an emergency brake only and will be tested at no load once a year, so I do not believe cyclical forces are a concern. The brake is designed for full load and will only be used if a catastrophic failure occurs to the system or if a power failure occurs during operation.

I like the idea of a mechanical interlock to reduce the shear force on the screws. The screws are being sized off of these calcs so they are not definite at this point, however due to tapped thickness of one disc half I have selected 1/2"-13 screws to start. The disc thickness is 30mm so at...

Thanks for all of the responses, the holiday kept me busy so I'm just getting back to this. I'll try to breakdown my responses by person. I have also attached a picture of the brake disc splice. btrueblood: I have assessed the flange bolts in shear and with frictional forces between the disc...