This Excel Software Tool is provided for the determination of Expected Strengths (at % Drift) of adjacent floor (or story) levels in a wood framed building, which depend on the sum total of Lateral Force Resisting System (LFRS) Elements used at each floor level; the resulting floor strengths (at % Drift) in both orthogonal directions (N-S and W-E) are used to check Story Strength Ratios for new or existing buildings.