QMC 4070R

ASME B30.5 / IMPERIAL 85%

Basis of Design
Item Description Remarks
Truck chassis Per customer
Driver weight 250 pounds Included in analysis
Fuel tank 100 gallons Included in analysis
Hydraulic tank 100 gallons Included in analysis, location may vary
Tool box 36” long Size may vary, aluminum construction
Minimum Frame Requirements

Minimum selection modulus per rail = 17.8 in.3

Minimum yield strength = 110 KSI

Weight Distribution
  Front Rear Total
Truck 10,680 7,090 17,770
Crane 4,410 19,260 23,670
Payload 4,910 7,650 12,560
Totals 20,000 34,000 54,000

Total axle limits shown are based on Federal D.O.T. regulations bridge formula.

Truck dimensions, weights, payload, and lifting performance representative of design baseline. Variations from information shown (truck weights, wheel base, front axle to back of cab, and more) may be accommodated and may result in adjustment of payload, payload size, and crane lifting capacity. Contact QMC Cranes with your requirements.

Load Chart

30 Foot Boom
Working
Radius
Boom
Angle
Rated Load
Rear Side Front
6 81 45,400 45,400 45,400
8 77 42,500 42,500 42,500
10 72 35,800 35,800 35,800
12 68 31,000 31,000 31,000
15 62 26,100 26,100 26,100
18 55 22,000 22,600 22,600
20 49 19,300 20,800 20,800
25 34 14,500 16,100 16,100
29 0 11,600 11,600 11,600
50 Foot Boom
Working
Radius
Boom
Angle
Rated Load
Rear Side Front
12 79 27,300 27,300 27,300
15 75 22,400 22,400 22,400
18 71 19,100 19,100 19,100
20 69 17,400 17,400 17,400
25 62 14,300 14,300 14,300
30 55 11,300 11,400 12,100
35 47 8,800 8,500 10,200
40 38 6,700 6,500 7,600
45 26 5,200 5,000 5,500
49 0 4,300 4,100 4,200
70 Foot Boom
Working
Radius
Boom
Angle
Rated Load
Rear Side Front
18 79 17,400 17,400 17,400
20 77 15,700 15,700 15,700
25 72 12,600 12,600 12,600
30 68 10,500 10,500 10,500
35 63 8,700 8,400 9,000
40 58 6,600 6,400 7,600
45 52 5,200 5,000 5,400
50 47 4,100 3,900 4,000
55 40 3,200 3,100 2,900
60 32 2,500 2,400 2,100
65 22 2,000 1,800 1,500
69 0 1,500 1,400 1,000

Red lines indicate transition from structural to tipping limits. Loads above the line are based on structural limits. Loads below the line are based on 85% actual tipping condition per ASME B30.5.

Wire Rope Capacity
Parts Line 1 2 3 4 5 6 7 8
Load Limit 9,080 18,160 27,240 36,320 45,400 0 0 0

Do not exceed parts of line ratings.

  1. Load does not include blocks, slings, and all other equipment used to handle objects being lifted.
  2. Load ratings are for zero degree list.
  3. Loads must be freely suspended.
  4. Rope: Rotation resistant, compacted strand, 9080 lb. capacity.
  5. This chart is only a guide and should not be used to operate the crane. Individual crane’s load chart, operating instructions, and other instructional plates must be read and understood prior to operating crane.