• Bois Expansion manufactures standard and made-to-measure staircase components based on architectural blueprints or standards set by a contractor. We have steps, risers, handrails, posts, balusters and closed stringers. Whatever the complexity or the scope of your project, Bois Expansion has the expertise, the products and the know-how to complete your project on schedule. With our sophisticated and very precise equipment, we can make curved staircases in every size or shape. We are your partner for your projects, no matter how simple or complex they might be.