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1018 is one, 12L14 has greater tensile strength and is free machining or 1144, the strongest of the three but still easy to turn. Plenty grease is your friend, and some new pins, from time to time. Apr 7, 2012 / Best Steel for Backhoe Pins/Bushings #4.
Here's a site to estimate deflection of 2x2x1/8" tubing. If the ends are fixed, a 9' piece of 2x2x.125" would deflect .2004" with a 500 lb. center load. 1/4" thick wall would deflect .1306" with the same weight. What weight would completely bend the tube to failure is not known. Deflection Calculator for Square Tubing.
Using Wl^3/48Ei=d where. W is load. l is length in inches. E is modulus of elasticity (steel is 29,000,000) i is moment of inertia (22.1 for your beam) Max load allowed based on deflection would be 1468lbs at a point in the middle of the beam. (distributed loads are a different animal).
JD 4700. CurlyDave, I like plastic since it won't rust. You need at least 12" of material over the culvert to get the maximum strength. Mine is covered maybe 6"-8" but it handled 55-60,000 pound dump trucks just fine. I used ABC to cover the culvert since that is what I was using to build the driveway.
This is a higher strength chain used for years in the trucking industry for tie downs that meet DOT specifications. Made from a higher carbon steel, its strength surpasses proof coil working load limits, size for size, by a factor of 2 to 1. Hallmarked every 1 to 3 feet with manufacturer's symbol and grade marking: 4, 40, 43 or 400.
Its been a while but it sounds like you have one unknown. Use the deflection based on double 2x10 and the maximum height. Solve for modulous of elasticity and then find a material that meets that number. Like i said, been 20 years since a dynamics class. Jul 22, 2017 / Steel beam - wood equivalent #3.
Metric grades such as 8.8 indicates a nominal (minimum) tensile ultimate strength of 800 MPa and nominal (minimum) yield strength of .8 times tensile ultimate strength or 0.8 (800) = 640 MPa. A metric 10.9 bolt is medium carbon steel, quenched and tempered while a 10.9 (underlined 10.9) is a low carbon boron steel, quenched and tempered. What ...
The basic formula is W= (1795*A*D)/L where W is the greatest safe load in pounds in the middle of an I beam, A is the cross sectional area of the I beam in sq. in., D is the depth of the I beam in inches, L is the length of the beam in feet. Here are some typical I beam numbers; 8" I beam (18.4 lb/ft) A = 5.34.
Messages. 1,399. I have an old table from "Wood Structural Design Data" that says the safe load for a dressed (S4) 6x6 beam at 6' is 3,697 lbs (it's 2,772 if you go to 8'). I just have an old waterstained photocopy, but I think it came from an old Pole Building book that I checked out from the library years ago.
If I understand the chart correctly 8.8, garde 5 and stainless are very close in tensile strength. Maybe he is correct in saying stainless could be used for 8.8 but not grade 2. Grade 2 are much lower. Grade 2 bolts I can easily get at the local hardware store.