Lift plan IB01-1: BB-1N Install new blow box BB-1
DRAFT Prepared by R. Okafor, Apex Rigging lift planner 2026-09-30
Item weight
2,840 lb
Certified (scale or OEM certificate)
Source: lift_plan
Gross load calc
5,362 lb
item + 22 rigging + 2,500 hook block
Source: lift_plan, rigging_gear, lift_crane
Capacity at radius calc
120,000 lb
Machine room crane (60t)
Source: lift_chart, lift_crane
% of chart calc
critical over 75%, not allowed over 90%
Source: lift_plan, lift_chart
Sling load per leg calc
1,640 lb
2 of 2 legs carrying at 60°
Source: lift_plan
Load and rigging
| Item | Qty | WLL lb | Weight lb |
|---|---|---|---|
| BB-1N Install new blow box BB-1 | 1 | 2,840 | |
| SH-30 Screw-pin shackle, 3.25 t | 2 | 6,500 | 6 |
| SL-20 Round sling, 8 ft, vertical | 2 | 8,400 | 16 |
| Hook block, Machine room crane (60t) | 1 | 2,500 | |
| Gross load | 5,362 |
Crane, path and people
- Crane
- Machine room crane (60t) (Overhead bridge crane, rated 120,000 lb, inspected 2026-06-23)
- Set-up
- n/a
- Pick
- Tending aisle · EL 100
- Set
- Between dryers · EL 128
- Exclusion zone
- Machine room tending-side aisle barricaded from the dryer to the laydown, basement below closed
- Wind limit
- n/a
- Lift director
- M. Alvarez, Apex Rigging lift director
- Operator
- Demo Mill crane operator
- Rigger
- K. Brandt, Northfield Millwright rigger
- Signal person
- S. Whitfield, Apex Rigging signal person
- Schedule
- IB01 Install blow box BB-1, 24-Jan-27 to 24-Jan-27
Checks
| PASS | Crane capacity | 5,362 lb gross is 4.5% of 120,000 lb. Limit 90%; over 75% is a critical lift. |
| PASS | Sling angle | 60° from horizontal; under 45° raises sling tension sharply and under 30° is not allowed. |
| PASS | SH-30 shackle | WLL 6,500 lb against 1,640 lb per leg (2 legs carrying at 60°) |
| PASS | SL-20 sling | WLL 8,400 lb against 1,640 lb per leg (2 legs carrying at 60°) |
| PASS | People named | Lift director, operator, rigger and signal person named. |
| PASS | Exclusion zone | Machine room tending-side aisle barricaded from the dryer to the laydown, basement below closed |
A cross-check for the lift team. The crane manufacturer's chart, the rigging ratings and the qualified lift director's sign-off govern the lift.