Section 4988.7 - Floating Cranes/DerricksFor equipment designed by the manufacturer (or employer) for marine use by permanent attachment to barges, pontoons, vessels or other means of flotation:
(a) Load charts.(1) The employer shall not exceed the manufacturer load charts applicable to operations on water. When using these charts, the employer shall comply with all parameters and limitations (such as dynamic and environmental parameters) applicable to the use of the charts.(2) The employer shall ensure that load charts take into consideration a minimum wind speed of 40 miles per hour.(b) The employer shall ensure that the requirements for maximum allowable list and maximum allowable trim as specified in Table M1 of this section are met. TABLE M1
| Rated Capacity | Maximum Allowable List (degrees) | Maximum Allowable Trim (degrees) |
| Equipment designed for marine use by permanent attachment (other than derricks): | | |
| 25 tons or less | 5 | 5 |
| Over 25 tons | 7 | 7 |
| Derricks designed for marine use by permanent attachment: | | |
| Any rated capacity | 10 | 10 |
(c) The employer shall ensure that the equipment is stable under the conditions specified in Tables M2 and M3 of this section. (NOTE: "Freeboard" is the vertical distance between the water line and the main deck of the vessel.) TABLE M2
| Operated at | Wind speed (mph) | Minimum freeboard (ft.) |
| Rated capacity | 60 | 2 |
| Rated capacity plus 25% | 60 | 1 |
| High boom, no load | 60 | 2 |
TABLE M3
| Operated at | Wind speed (mph) |
| For backward stability of the boom: | 90 |
| High boom, no load, full back list (least stable condition) | |
(d) If the equipment is employer-made, it shall not be used unless the employer has documents demonstrating that the load charts and applicable parameters for use meet the requirements of subsections (a) through (c). Such documents shall be signed by a certified agent knowledgeable with respect to the design of this type of equipment (including the means of flotation).(e) The employer shall ensure that the barge, pontoons, vessel or other means of flotation used:(1) Are structurally sufficient to withstand the static and dynamic loads of the crane/derrick when operating at the crane/derrick's maximum rated capacity with all planned and actual deck loads and ballasted compartments.(2) Have a subdivided hull with one or more longitudinal watertight bulkheads for reducing the free-surface effect.(3) Have access to void compartments to allow for inspection and pumping.Cal. Code Regs. Tit. 8, § 4988.7
1. New section filed 7-26-2022; operative 7-26-2022 pursuant to Government Code section 11343.4(b)(3) (Register 2022, No. 30). Filing deadline specified in Government Code section 11349.3(a) extended 60 calendar days pursuant to Executive Order N-40-20 and an additional 60 calendar days pursuant to Executive Order N-71-20. Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. New section filed 7-26-2022; operative 7/26/2022 pursuant to Government Code section 11343.4(b)(3) (Register 2022, No. 30).