The new Quebec public Forests law, voted in 1986, has obliged forest enterprises using the same supplying territory to integrate their activities and to agree on cost sharing. Cost sharing of forest infrastructures can cause problems and disputes.Until 1986, it was common practice for the first enterprise harvesting wood in a territory to build roads and bridges and pay for them partially or totally. Trying to solve the problem mentioned above and to correct that unfair practice, many are presently tempted to charge the average cost to each enterprise; this approach is no fairer than the preceding one and even threatens the profitability of some enterprises.This article proposes a third approach that should be more appropriate; it is already used in at least one other activity sector and it is based on the products' realization value; it is familiarly called the "beef method". When applied with judgment, this approach can be useful to minimize the number of cases of cost sharing under dispute that are now mandatory under the new Quebec law.