How to calculate outrigger ground pressure when building a dunnage/cribbing pad:

[@jimmyg6017]

Wow I’m carrying bigger pads with me from now on

[@canadianconcretepumper1979]

It’s quite shocking when we actually run the numbers. I’m going to say that 90% of concrete pumps out there aren’t using sufficient dunnage based upon these figures.

[@vegetablesouper9379]

Shared knowledge from skillful veterans to hungry apprentices fuels the growth in every trade. Your leadership is appreciated and valued. Thank you from all of us learning through your efforts and your generosity :)

[@canadianconcretepumper1979]

Thank you so much for the kind words. Always lots to be learned from one another in this specific trade 🙏🙏🙏

[@michaellemay7004]

Thank you Scott for Sharing all your experiences with us its truly amazing to keep learning more about Concrete pumping I've learned So much about pump trucks and line pumping. And will always keep learning more everyday Thank you

[@canadianconcretepumper1979]

That’s the best attitude to have brother, us operators have the opportunity to learn something new most everyday in this trade. Appreciate you following the channel 🙏🙏🙏

[@bradleym.2008]

Buying my first boom this week actually, I can’t get enough of these videos. Thanks for putting them out there for us

[@canadianconcretepumper1979]

Congrats man!!! Glad these videos could be of some help 👍🏼👍🏼👍🏼

[@austinpalmlund5054]

Wow, I’ve never heard that explained to such a degree, really eye opening considering we use a regular 24x24 for 98% of what we do and only use 2 24x24 pads under the top pad if it’s soft. Mostly clay soil in our area

[@canadianconcretepumper1979]

Yup, even just a half dozen lengths of timber makes a world or difference 👍🏼👍🏼👍🏼

[@danjarvis6980]

The simplicity of this instruction is a real jewel, while bringing the ground PSI into limits. Retired now but had to work around concrete as electrician running 4" rigid conduit into slabs for large electrical switch gear with a turned up elbow or straight pipe into transformer vault. I still remember some numbers, a yd was 27 cu.ft., a yd weighed around 4,000 lbs, a cu.ft was 150 lbs. 12 runs of straight 4" I.D. Rigid conduit 20' feet long, 240" inches, would reduce the concrete required by 1 yard. A yard with slab 8" inches thick will cover 41 sq.ft.per yard. All our jobs years ago were with concrete trucks dumping into a large bucket or hopper then lifted by crane especially when pouring a waffle or pan slab. Question-How do you push the last of the concrete out of hose or pipe.. is it done with some type slug in front of air pressure behind it or what..??

[@fronabargerconveyingpumping]

Excellent Video!

[@roberthaynes8131]

good information

[@danjarvis6980]

Excellent posting and clear instruction. While the mobile pumping machine is not a crane per se, some safety principles would probably apply to both. I noticed a sloped embankment or ditch in front of the machine. Not sure what the rule of thumb is for safe distance from outrigger to edge of embankment ..? probably depends on depth of slope and weight of machine including load and the current GBC ( Ground Bearing Capacity ) of the soil. No criticism just curious. My friend was bent over running pipe in a ditch about 6 feet deep with no shoring , before OSHA. Vibration from a machine caused the walls of the ditch to suddenly collapse. Three guys just happened to be standing directly above him when it caved. They knew exactly where to dig. Racing furiously they got him out of mostly loose sand. He made it, had some torn ligaments in a leg, three broke ribs from sand compression but was alive thank God, and those who dug him out.

[@canadianconcretepumper1979]

Awhile back, I actually did a dedicated video pertaining to exactly what you mention: kzbin.info/www/bejne/op64iJypa76hp5Ysi=-IAnK5Tmsp38k8eH Appreciating you watching and commenting/ definitely can’t be too safe/overkill when it comes to outrigger dunnage 👍🏼👍🏼👍🏼

[@kyledally8410]

Last year I had rock solid silt until it gets wet. 1/2 through the pour we had a monsoon and lighting storm. I had to lay the boom flat out for 2 hours. I was really glad I used a little extra that day.

[@canadianconcretepumper1979]

Always nice to have that piece of mind which comes with using a little extra material underneath of the outriggers 👍🏼👍🏼👍🏼

[@DustinCook-bh4qs]

Good video!

[@DangleMan27]

What size pads are those under the 24x24?

[@canadianconcretepumper1979]

18”X48”. We have found these to be the most versatile as well as user friendly pad size for the 40M-ish and smaller pump sizes.

[@DangleMan27]

@@canadianconcretepumper1979 love these! We run the 24”x24” and the 48”x48”. These are the missing pieces we need.

[@canadianconcretepumper1979]

@@DangleMan27 Yes, they are just about the perfect size for one guy to manage on his own without any help needed.

[@billiamnye6562]

why are 2x4's considered non appropriate for dunnage ? I understand that larger timbers or dica type synthetic cribbing is obviously superior but if you stack enough 2x4's they have to equate to a larger piece of lumber based on just volume, no? The outrigger doesn't know if you have a dozen 8x8's or a whole lift of 2x4's underneath it, as long as they are laid out in a humane manor and can remain sturdy

[@canadianconcretepumper1979]

Placed horizontally, the strength of timbers increases exponentially with size. (Eg: two 2x4’s placed one on top of the other are not as strong in terms of horizontal load bearing capabilities as one single piece of 4X6 timber of the same length.

[@newrealm9187]

The coasts of Florida have great ground conditions, almost never need dunnage.

[@felipecastro2765]

1:30

[@canadiandro8063]

This should be taught in pump school for operators union

[@mikedaniels9061]

It is lol

[@black-emperor34]

BSF38-5.16HZ!

[@ginoasci]

The flexibility in those pads render your calculations Inaccurate. Ya guddah have the stiffness in the pads to backup the math. Noe eye say’n

[@canadianconcretepumper1979]

The “Fibre Tech” (yellow pads) used here for the base layer are incredibly stiff. The thermoplastic pads used for the second layer and top pad do have some flex to them (we typically would used fibre tech pads as the second layer as well, but ran short of them on this day). Used in multiple layers like this flex is minimized, but agreeably not as rigid as something like a 6”X6” timber. That being said, neither is a steel road plate. The engineering behind the pads is that they will flex to a certain degree but will not completely fail, whereas a wooden pad has very little initial flex, but is much more prone to complete failure if/when it does bend. It is tough to beat large timbers or swamp pads for sure, the problem is finding room on the pump for carrying enough of them to build a pad of sufficient surface area.

[@ginoasci]

@@canadianconcretepumper1979 : Thank you

[@canadianconcretepumper1979]

@@ginoasci Thank you for the comment. It’s a great discussion point for sure 👍🏼👍🏼👍🏼

[@greghughey9738]

If it's wood timbers, hard wood only. Other than that, great as usual

[@canadianconcretepumper1979]

I thought about that after the fact. I’ve seen some guys using 2”X6” oak Timbers, which are pretty skookum.

[@greghughey9738]

@Canadian Concrete Pumper Ya..that's a no go for me also, absolutely not. I need the truck to stay soft side down, and I don't need to be worrying about my setup. 4x6 Hard wood minimum

[@canadianconcretepumper1979]

@@greghughey9738 when you say hard wood, are you talking something aside from the standard spruce or fir?

[@greghughey9738]

@Canadian Concrete Pumper oak preferably. It's heavy, and it's expensive, but it's strong and it lasts. Bossman gets us dimensional cut 4"×6"×4' 200 at a time. I like to keep 42-44 on the 63, 97,800/92,200 isn't something I'm willing to play with Neat factoid, unrelated to cribbing, the 63 I run is #2 off the assembly line. Being a horsepower junkie, I've grown weird about vin#s. Doesn't get much lower than #2 lol