D8 vs D8+ Stage Hoists Explained
According to IGVW SQP2, a D8 hoist may not hold or move loads over people without additional safety measures, while a D8+ (D8 Plus) hoist is designed to hold loads over people while at rest without a secondary safety device – but no one may be under the load while it moves. The Dingyou DY+ stage hoist is designed to D8+ principles; for overhead use, specify the dual-brake option.
Where the classifications come from
The D8, D8+ and C1 classes are described in IGVW SQP2 (status 03/2024), published by the IGVW. SQP2 originates from the German regulations DGUV Vorschrift 17/18 for event and production venues, and the classes are widely used in entertainment rigging specifications.
What does D8 mean?
A D8 hoist may not hold or move loads over people without additional safety measures – for example secondary suspension such as safety steels, set up before anyone goes under the load.
What does D8+ mean?
A D8+ hoist is designed to hold loads over people while at rest, without a secondary safety device. No one may be under the load while it is moving. SQP2 describes two ways to meet D8+:
- D8 hoist plus a second brake, derated – a D8 hoist fitted with a second brake and derated to half its capacity.
- Purpose-designed hoist – a hoist whose load path is dimensioned for at least 2× rated capacity at rest, with an 8:1 chain operating coefficient.
What does C1 mean?
A C1 hoist complies with DIN EN 17206 and can hold and move loads over people. The requirements – second brake, double limit switches, overload shutdown and suitable controls – apply at system level and are set by risk assessment.
Comparison table
| D8 | D8+ | C1 | |
|---|---|---|---|
| Hold load over people at rest | Only with additional safety measures | Yes, without secondary safety device | Yes |
| Move load over people | No | No | Yes |
| How it is met | Base class | D8 + second brake, derated to 50%; or load path ≥ 2× rated at rest with 8:1 chain coefficient | DIN EN 17206; system-level requirements set by risk assessment |
Source: IGVW SQP2 (status 03/2024).
How the Dingyou DY+ fits
DY+ is designed to D8+ principles: chain with an 8:1 safety factor, load path dimensioned for overhead holding, and an optional dual brake for single-fault tolerance. For overhead (D8+) use, specify the dual-brake option and confirm requirements with your rigging plan and local regulations.
From the 2026 catalogue (p. 19):
- Alloy-steel lifting chain with an 8:1 safety factor and a 360° rotating alloy-steel hook.
- Independent electromagnetic brake as standard, locking immediately on power loss; dual electromagnetic brake available as an option.
- 7 mm aviation-grade high-strength aluminium housing; IP66 protection; 4 m/min lifting speed.
- 16 A, 4-pin CEE industrial connector; folding design with rubber handles.
| Brake configuration | Brakes | Intended use |
|---|---|---|
| DY+ standard | One independent electromagnetic brake | General lifting; not for holding loads over people without additional safety measures |
| DY+ with dual-brake option | Two electromagnetic brakes (single-fault tolerance) | Specify for overhead (D8+) use, confirmed against your rigging plan and local regulations |
Is DY+ certified to D8+?
No. The DY+ holds a TÜV Rheinland LGA certificate under the EC Machinery Directive and a UDEM attestation for the Machinery and EMC directives (see Certifications & Compliance). These are not D8+ certifications.
DY+ specifications
| Rated load | Motor power | Lifting speed | Chain (mm × falls) | Protection | Noise | Self-weight excl. chain | Chain weight |
|---|---|---|---|---|---|---|---|
| 250 kg | 0.23 kW | 4 m/min | 4 × 12 × 1 | IP66 | 50 dB(A) at 1 m | 14 kg | 0.36 kg/m |
| 500 kg | 0.45 kW | 4 m/min | 5 × 15 × 1 | IP66 | 50 dB(A) at 1 m | 20 kg | 0.54 kg/m |
| 1,000 kg | 0.75 kW | 4 m/min | 7.1 × 21.3 × 1 | IP66 | 50 dB(A) at 1 m | 34 kg | 1.05 kg/m |
| 2,000 kg | 1.55 kW | 4 m/min | 10 × 30 × 1 | IP66 | 50 dB(A) at 1 m | 50 kg | 2.1 kg/m |
Source: Dingyou 2026 catalogue, pp. 19–20.
What about C1 and servo hoists?
Dingyou’s servo CNC hoist has dual electromagnetic brakes independent of the motor, a 10× chain safety factor, four-point multifunction limits (overtravel, anti-collision with the top and position zeroing) and optional load sensing. These features suit C1-type system designs, subject to the system’s risk assessment. For control, see hoist controllers.
Frequently asked questions
Is DY+ certified to D8+?
No. DY+ certificates cover the EC Machinery and EMC directives. DY+ is designed to D8+ principles; for overhead (D8+) use, specify the dual-brake option and confirm requirements with your rigging plan and local regulations.
Can I hold a load over people with the standard single-brake DY+?
Specify the dual-brake option for overhead (D8+) use, and confirm the requirements with your rigging plan and local regulations.
Can a D8+ hoist move a load over people?
No. Under SQP2, no one may be under a D8+ load while it moves. Moving loads over people requires a C1 system.
Can I use a D8 hoist over people?
Only with additional safety measures, such as secondary suspension.
Does D8+ mean the whole installation is safe?
No. The classification describes the hoist. The rigging, controller and installation need their own review.
Where can I get a quote?
Contact Dingyou with load, lift, quantity, power supply and brake configuration.
Request a quotation
Send us your requirements – load, lifting height, quantity, controller and delivery destination – and we will prepare a quotation.