Picking question

[poetmk]

I have a question about using cranes. If you have a crane similar to the one in the attachment, is it ok to lift with the boom on the other side of the outriggers toward the cab? I’ve seen it done before and from what I know lifting should be done from the outriggers towards the bed, not over the cab. Where I used to work we would rent a smaller crane (12-18ton) once in a while and I often ran the crane. Usually smaller stuff down in creek beds – logs, brush, etc. and I never tried going pass the outriggers – an alarm would always sound when I even came close to going past them.

Thanks a bunch,

mk

 

[Kevin]

It may be ok with a good load on the bed but not empty.
Can't say for sure without knowing what the manufacturer recommends.

 

[poetmk]

ok - thanks - that helps

peace,

matthew

 

[Mahk_Adams]

Check the charts. There should be a load chart and a range of motion chart. They are usually permanently mounted on the crane.

 

[allmark]

I would say yes with the proper experience. Around here you would do 90% of picks with a crane like that over the front or you couldnt reach. Most of mine are from the front outriggers forward. I almost never pick nearthe rear or rear corners. Also whenyou pickover the cab you look up in the air and can see the load then set down behind you so you can still see the load. Setting down overthefront is a PIA.

 

[MikePoor]

Hey poetmk, Yeah be careful with all cranes, and check charts etc. They are all different and light weight single axle truck cranes are the worst for "working over the front" They just don't have near enough weight in the back! Be careful loading the bed for counterweight: you might keep the rear end onthe ground, but the frame going under the cab on that truck probably isn't strong enough to work over the front! (Crane dealers beef up the frame behind the cab, but the extra steel doesn't extend under the cab,creating a weak point in the frame where the sub frame stops. Many of these actualy break frame rails!)

 

[Lumberjack]

I'd doubt it's rated for a 360 load chart, most that size have a front single outrigger on the front bumper.

 

[tod_k]

Our boom truck has a 360 chart. To get the chart you need a front outrigger.

 

[poetmk]

thanks everyone for the input - i really appreciate it. haven't done a whole lot of crane work but it looks like it's coming my way. are there any good books out there for crane work in Arboriculture?


peace,


mk

 

[brushbandit]

Most boom trucks need a front jack by the front bumper to get a 360* load chart, their are some exceptions. For example Simon and Terex BT 4792's ( 23.5 ton, 92') built before 1999 have a 360* load chart without a front jack. The same crane built after 1999 up to present needs a front jack to get the 360* load chart. The crane changed very little, the new 4792 you buy today is basically unchanged from the pre 1999 crane except for the lack of a 360* load chart. Maybe their were a few accidents and the lawyers got involved? Also Pioneer boom trucks have a 360* load chart without a front jack, they have a strange 4 outrigger arrangement. With any crane you need to be careful lifting over the front, I personally try to avoid it whenever possible.

 

[craneguy1]

there is a video available poet, "cranes and modern arboriculture" with mr. chisholm in it. i think i got it from this site about 6 years ago. never ever found any literature on "how to pick this and that" that's experience and constant learning. start very very slowly, and don't ever, ever, EVER become complacent. and yeah, working over the front can really tweak the neck. (i have a front stabilizer and 3k in counterweight on my short wheelbased tandem truck)

 

[poetmk]

thanks for the reply - i think i will try to find that video -

peace,

mk

 

[Mahk_Adams]

Just want to mention that most of the replies mentioned refering to the load chart. very important.

Be aware that the video makes frequent reference to the ANSI Z133.1 standards, but it the 2000 version to which they refer. The 2006 is the current standard. Still a good video.

Oh, did I mention (?), check the chahts.

 

[poetmk]

thank you the update info - and i'm not quite sure what you meant by this:

Oh, did I mention (?), check the {chahts}.

did you meant the chats? here at the buzz?


peace,

matthew

 

[allmark]

[ QUOTE ]
thank you the update info - and i'm not quite sure what you meant by this:

Oh, did I mention (?), check the {chahts}.

did you meant the chats? here at the buzz?


peace,

matthew

[/ QUOTE ]
I think he meant check the CHARTS

 

[poetmk]

aahh - that would make sense i was sitting here thinking, "man, i need to brush up on my internet acronyms!"


peace,

mk