Many contractors focus only on lifting capacity, boom length, and spider crane price when shopping for lifting gear. They overlook one critical factor: ground‑bearing capacity. Even a high‑quality YG tracked mini crane can tip over if set up on soft, unstable ground. A reliable YG tracked mini crane delivers great performance on rooftops, narrow alleys, indoor renovation, and outdoor construction sites. But machine performance means nothing without solid supporting ground.
Whether you are running a small spider crane or browsing mini spider cranes for sale, you have to understand ground load requirements. The YG tracked mini crane comes with multi‑point outriggers to spread weight, yet outriggers will sink if the ground cannot take the pressure. Many site accidents are not caused by machine defects, but by poor ground preparation. Investing in a good YG tracked mini crane also means investing time in site ground inspection. If you want to know more details, please contact YG anytime.
Parameters of YG Spider Crawler Crane
| Model | YG-3 | YG-5 | YG-8 | |
| Specification | 3t | 5t | 8t | |
| Maximum working radius | 8.83m×0.15t | 14m×0.5t | 16.5m | |
| Maximum above-ground head | 9.9m×0.7t | 16.8m | 18m | |
| Winch device | Hook Speed | 0-8m/min(4 rope) | 12m/min(4 rope) | 12m/min(4 rope) |
| Rope diameter | φ8mm×45m | Φ11mm×80m | Φ11mm×80m | |
| Telescopic system | Boom Type | 5-section boom, pentagonal structure | 5-section boom, pentagonal structure | 5-section boom, pentagonal structure |
| Boom Length/Time | 3.1m-9.2m/20sec | 12.3m/54sec | 12.3m/54sec | |
| Up and down | Boom Angle/Time | 0°~78°/13sec | 0°~78°/13sec | 0°~78°/13sec |
| Slew system | Slew Angle/Speed | 0-360°continuous/60sec | 0-360°continuous/38sec | 0-360°continuous/38sec |
| Traction system | Walking Way | Hydraulic motor drives | Hydraulic motor drives | Hydraulic motor drives |
| Walking Speed | 0~2.5km/h | 0~2.5km/h | 0~2.5km/h | |
| Grade Ability | (25°)36% | (25°)36% | (25°)36% | |
| Operating system | Operation type (Boom/outrigger) | Manual operation, manual walking(remote control option) | Manual operation, manual walking(remote control option) | Manual operation, manual walking(remote control option) |
| Operating characteristics | Manual operation, remote control | Manual operation, remote control | Manual operation, remote control | |
| Transport parameters | L*W*H(mm) | 2950*980*1560 | 5000*1500*1900 | 5000*1600*2180 |
| Total weight(kg) | 2700 | 6200 | 7200 | |
What Is Ground‑Bearing Capacity For Spider Cranes?
Simply put, ground‑bearing capacity means how much pressure the soil, concrete slab, or floor can withstand without sinking, cracking, or collapsing.
A small spider crane, including its own dead weight plus lifted load, concentrates heavy pressure on each outrigger foot. Even compact units like a tracked mini crane create high point pressure when lifting heavy items. On hard concrete, the pressure spreads easily. On soft soil, mud, backfill soil, thin asphalt, or old indoor floor slabs, the outrigger feet will sink little by little. Sinking leads to machine tilting, triggers tilt alarms, and in worst‑case scenarios causes tip‑over accidents.
For indoor jobs such as shopping‑mall renovation or basement work, you cannot assume the building floor can hold the load. Many old slabs, raised floors, and suspended platforms have strict load limits. Outdoor sites face risks from rain‑softened clay, filled earth, and hidden underground voids you cannot see by eyes. Your mobile spider crane can only work safely when every outrigger sits on ground that meets pressure requirements.
Common On‑Site Mistakes Caused By Ignoring Ground Bearing
Lots of operators make avoidable mistakes on site, especially new owners who just bought mini spider crane for sale units:
- Skipping ground check for quick setup: Operators rush to start lifting work without checking soil hardness. After rain, wet clay becomes soft; outriggers slowly sink during lifting. Even with fully extended outriggers, the YG tracked mini crane will tilt.
- Using undersized or thin wooden boards only: Some crews place small thin wood blocks under outriggers. A small contact area cannot spread pressure. Boards crack, and pressure still punches through into soft ground.
- Working on unknown indoor floors without engineering data: For indoor renovation, teams set up a small spider crane on suspended slabs without checking floor load parameters. Slab cracking brings property damage and safety hazards.
- Working close to trenches and slope edges: Setting the mobile spider crane near ditches or slope edges. Soil beside trenches may slide even if the surface looks firm, leading to partial ground collapse under outrigger feet.
- Judging ground condition only by eyesight: Dry‑looking soil can still be loose backfill. Surface appearance cannot tell you real bearing capacity.
4 Practical Steps To Check & Improve Ground Conditions
These easy‑to‑follow steps work for any yg tracked mini crane before every lifting task.
- Visual and manual site inspection: Check for mud, puddles, recent rain, filled soil, cracks and hidden trenches. Stay far away from slope edges. If you work indoors, get official floor‑bearing data from building engineers.
- Use spreader plates/crane mats: When ground is soft, place large‑size steel or composite spreader plates under every outrigger foot. Larger plates expand contact area and reduce unit pressure onto ground. Never skip spreader plates to save time.
- Pre‑test before full lifting: After deploying all outriggers, lift the test load a short distance off the ground. Watch for sinking, shifting, or tilting. Stop work immediately if you spot outrigger feet sinking.
- Critical heavy‑load lifts need professional evaluation: For high‑risk heavy lifting, ask geotechnical engineers to confirm ground‑bearing capacity. Do not take chances even if your mini spider crane for sale unit has advanced safety alarms. Alarms are backup protection, not a replacement for good ground preparation.
What Should You Check Before Buying a Spider Crane?
When comparing a spider crane price, don’t focus only on the purchase quotation.
Ask the supplier for technical information.
Check the Maximum Rated Capacity
Understand what the maximum capacity actually means.
A crane rated at a certain tonnage may only achieve that capacity under specific boom and radius conditions.
Request the Load Chart
The load chart is one of the most important documents.
It tells you how lifting capacity changes according to:
- Boom length
- Working radius
- Boom angle
- Outrigger configuration
Never plan a lift using maximum capacity alone.
Check Ground Pressure Data
If available, ask the manufacturer for ground pressure or outrigger reaction information.
This is especially important when the machine will operate on:
- Finished floors
- Asphalt
- Pavers
- Soil
- Roof decks
- Sensitive surfaces
Want To Quickly Launch A New Project? Contact YG For Customized Services
Ground‑bearing capacity is the most overlooked safety factor for compact lifting equipment. No matter whether you own or plan to buy a YG tracked mini crane, a flexible small spider crane, or a multi‑purpose mobile spider crane, never skip ground assessment before lifting. If you are browsing mini spider crane for sale and want to know more about site setup, outrigger requirements, or real spider crane price, contact the YG team.