In a previous Letter we derived analytic expressions to describe the adsorption kinetics of trimers on two-dimensional arrays. As a prerequisite to find the average saturation coverage at the jamming limit () we had to solve first the kinetic rate equation, which is a lengthy and troublesome task. This motivated us to derive a faster and easier procedure to determine . The method allows the exact determination Of when a small two-dimensional lattice is bombarded by objects that occupy 2 contiguous lattice sites, and is applied on a beta >= 2 lattice ceaselessly bombarded by linear trimers. (c) 2005 Elsevier B.V. All rights reserved.