QMC 8078C

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
Minimum Frame Requirements

Minimum selection modulus per rail = 39.8 in.3

Minimum yield strength = 110 KSI

Weight Distribution
  Front Rear Tag Total
Truck 10,540 8,470 8,470 20,770
Crane 9,140 24,470 6,560 40,170
Payload 320 1,060 180 1,560
Totals 20,000 34,000 8,500 62,500

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

34 Foot Boom
Working
Radius
Boom
Angle
Rated Load
Rear Side Front
6 74 101,500 101,500 101,500
8 70 90,600 90,600 101,500
10 66 80,900 80,900 94,600
12 62 73,000 73,000 83,500
15 57 63,400 63,400 67,900
18 50 55,900 55,900 55,900
20 45 49,800 49,800 49,900
25 32 34,100 38,800 38,800
56 Foot Boom
Working
Radius
Boom
Angle
Rated Load
Rear Side Front
8 79 68,800 68,800 68,800
10 77 68,800 68,800 68,800
12 75 69,500 70,300 70,300
15 72 63,500 63,500 64,400
18 68 56,000 56,000 56,200
20 66 50,200 50,200 50,200
25 60 34,700 39,100 39,100
30 54 25,900 27,000 31,700
35 47 20,200 19,900 26,300
40 39 16,200 15,300 19,000
45 30 13,300 12,000 14,200
50 16 11,000 9,600 10,900
78 Foot Boom
Working
Radius
Boom
Angle
Rated Load
Rear Side Front
12 81 53,400 53,400 53,400
15 78 46,500 46,500 46,500
18 76 40,600 40,600 40,600
20 74 37,500 37,500 37,500
25 70 31,100 31,100 31,100
30 66 26,000 26,500 26,500
35 62 20,300 20,000 23,000
40 57 16,400 15,400 19,300
45 53 13,500 12,200 14,500
50 48 11,200 9,900 11,300
55 42 9,400 8,000 8,900
60 36 8,000 6,600 7,100
65 29 6,800 5,400 5,700
70 20 5,800 4,400 4,600
74 0 1,900 1,900 1,900

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 9
Load Limit 11,280 22,560 33,840 45,120 56,400 67,680 78,960 90,240 101,520

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.