The seismic response of un-reinforced masonry structures resulting from in-airplane stiffening of their single-layer timber floors is numerically investigated by the use of non-linear incremental dynamic analyses. Two independent situation scientific tests of two-storey properties with timber flooring stiffened with alternative methods (addition of 45° oriented timber boards, of https://masonrytotimber64196.blog5star.com/2553151/the-fact-about-masonry-to-timber-that-no-one-is-suggesting