Rates, Norms & Durations / Transportation / Conveying Systems
Hoists & Cranes
3 entriesSource page: Hoists & Cranes
Subjects on this page
| Activity | Entry (verbatim) | Value | Source |
|---|---|---|---|
| Crane Grab | Tender rates are often quoted as between 20 and 25 m3/hr. With adequate supervision and sufficient loose spoil material supplied to the crane drop area, these rates can easily be increased. Grabs mounted on crawler cranes, rates depend on... Depth of the spoil to be removed Operative supervision - breaks etc Management and availibility of lorries Efficiency and utlisation of banksmen Transport of spoil to crane drop area Down time of machinery and staff Clamshell Grab Mounted on a crawler crane... 2.0 m3 bucket (HK Cut & Cover Tunnels) 33 m3/hr 1.5 m3 per lift 2.9 mins per lift 2.5 m3 bucket (HK Station Box) 41 m3/hr 2.0 m3 per lift 3.1 mins per lift3 rate statements found; left for an editor | — | Crane Grab |
| Hydraulic Excavator | Tractor with backactor, Massey Ferguson or JCB.3 has a 0.3 m3 bucket. Smaller 360 degree excavator has a 0.4 m3 bucket. JCB.6D, Liebherr 400, Hymak 580 or typical 360 degree machine has a 0.5 m3 bucket. 360 degree excavator machine has a 0.6 m3 bucket. Large 360 degree crawler backhoes have a 0.75 m3 bucket. | — | Hydraulic Excavator |
| Rail Grab | Machine Rail Mounted Hydraulic Grab Rate of 30 - 50 m3 of sand per hour (dependant upon depth), with 1.5 m3 made (2.0 m3 bucket) with each machine lift. Giving a required lift rate of 2.4 mins. A rate of 37 m3/hr (per rig) was achieved on HK Station box excavation. This was achieved with inadequate supervision and and long breaks etc. The standard lift time was 3 mins. | 37 m3 per hrper hrParsed | Rail Grab |
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These values were contributed by members and reflect the conditions, methods and regions they worked in. They are a starting point for estimating, not a standard. Check them against your own records, the site conditions and the contract before relying on them.