Has anyone ever heard of Michigan’s “Frost Law”? Me neither, until I called 6 landscaping and garden supply companies looking for bulk soil/compost for my new beds. According to 257.722
(8) Except as provided in this subsection and subsection (9), during the months of March, April, and May in each year, the maximum axle load allowable on concrete pavements or pavements with a concrete base is reduced by 25% from the maximum axle load as specified in this chapter, and the maximum axle loads allowable on all other types of roads during these months are reduced by 35% from the maximum axle loads as specified. The maximum wheel load shall not exceed 525 pounds per inch of tire width on concrete and concrete base or 450 pounds per inch of tire width on all other roads during the period the seasonal road restrictions are in effect.
In short, this law dating from 1949 is designed to limit road damage from heavy loads during the freezes and thaws of spring. A few paragraphs on, we get this gem:
(12) The loading maximum in this subsection applies to interstate highways, and the state transportation department, or a local authority with respect to highways under its jurisdiction, may designate a highway, or a section of a highway, for the operation of vehicles having a gross vehicle weight of not more than 80,000 pounds that are subject to the following load maximums:
(a) Twenty thousand pounds on any 1 axle, including all enforcement tolerances.
(b) A tandem axle weight of 34,000 pounds, including all enforcement tolerances.
(c) An overall gross weight on a group of 2 or more consecutive axles equaling:
| W = 500 /LN + 12N + 36\ |
| \N-1 / |
where W = overall gross weight on a group of 2 or more consecutive axles to the nearest 500 pounds, L = distance in feet between the extreme of a group of 2 or more consecutive axles, and N = number of axles in the group under consideration; except that 2 consecutive sets of tandem axles may carry a gross load of 34,000 pounds each if the first and last axles of the consecutive sets of tandem axles are not less than 36 feet apart.
No heavy loads in big trucks= no bulk supplies in supply centers (believe me, they’re pissed about this law)= no planting for Eitan yet…= time for other projects (details to follow).














