CONSTRUCTION WITH COUNTER-LAMINATED TIMBER (CLT) BOARDS HAS SUBSTANTIAL CAPACITIES IN PREFABRICATION AND ENVIRONMENTAL PER FORMANCE, AS IT HAS BEGUN TO APPLY TO SOME BUILDINGS. THIS WORK ANALYZES THE CONDITIONS OF ARCHITECTURAL MODULATION IN SMALL CLT-CONSTRUCTIONS, IN ORDER TO DETERMINE THE DESIGN STRATEGIES AND PRODUCTION STANDARDIZATION THAT AN IMPELL ITS USE. FIRST, PRO DUCTIVE CHARACTERISTICS, AND THEN ARCHITECTURAL DIMENSIONS OF AN INTERNATIONAL SAMPLE OF CASES ARE REVIEWED, IDENTIFYING CONVER GENCES IN THE MAGNITUDES AND ORDINANCES, AS WELL AS A SIGNIFICANT VERSATILITY OF DESIGN AND SPATIAL EXPRESSION. THESE PROPERTIES REVEAL THE POSSIBILITY OF FOCUSING ON THE PRODUCTION IN THE DIMENSIONS AND CONFIGURATIONS MORE USED, TO FACILITATE ITS ELABORATION AND IMPLEMENTATION, AS WELL AS TO DIVERSIFY ARCHITECTURAL ARRANGEMENTS TO DISSEMINATE THIS CONSTRUCTIVE TECHNOLOGY

PRODUCTS DERIVED FROM TREES HAVE BEEN USED BY MANKIND FOR THOUSANDS OF YEARS, WHERE TIMBER HAS A LONG TRADITION AS AN ECOLOGICAL CONSTRUCTION MATERIAL. THERE IS CURRENTLY AN INCREASING TREND IN MULTI-STOREY TIMBER BUILDINGS, BECAUSE OF THE PROJECTED GROWTH IN THE DEMAND FOR HOUSING IN URBAN AREAS BETWEEN NOW AND 2050, ALONG WITH THE URGENT NEED FOR A MORE SUSTAINABLE AND PRODUCTIVE CONSTRUCTION INDUSTRY. THE CONSTRUCTION OF THESE BUILDINGS IS NOW POSSIBLE THANKS TO THE NEW ADVANCES IN ARCHITECTURE, ENGINEERING, AND CONSTRUCTION (AEC) AND THE NEW TECHNOLOGICAL DEVELOPMENTS AROUND TIMBER CONSTRUCTION. ITS INDUSTRIALIZATION REQUIREMENTS IMPLY A PARADIGM SHIFT FOR THE CONSTRUCTION INDUSTRY, WHICH REQUIRES, AMONG OTHER ASPECTS, THE EARLY AND COLLABORATIVE INTEGRATION OF STAKEHOLDERS IN ITS DESIGN AND CONSTRUCTION PROCESS. ACCORDING TO THIS, THE OBJECTIVE OF THIS REVIEW ARTICLE IS TO DETERMINE THE MAIN ADVANCES AND LIMITATIONS RELATED TO THE DESIGN AND CONSTRUCTION OF MULTI-STOREY TIMBER BUILDINGS, CATEGORIZING THEM IN ASPECTS SUCH AS SUSTAINABILITY, ENGINEERING AND CONSTRUCTION SCIENCES, AND COLLABORATIVE DESIGN. THE METHODOLOGY OF THIS ARTICLE WAS BASED ON THE REVIEW OF 266 ARTICLES PUBLISHED IN WEB OF SCIENCE (WOS), AS INDEXED SCIENTIFIC JOURNALS, BETWEEN 2017 AND MID-2022, PERFORMING A COMPARATIVE AND COOCCURRENCE ANALYSIS OF THE CONTENTS. THE RESULTS EVIDENCED THAT 73% OF THE ARTICLES SHOWED ADVANCES AND LIMITATIONS CORRESPONDING TO THE ENGINEERING AND CONSTRUCTION SCIENCES CATEGORY, 23% TO SUSTAINABILITY, AND THE REMAINING 4% TO COLLABORATIVE DESIGN. THE MAIN ADVANCES IN THE DEVELOPMENT OF MULTI-STOREY TIMBER BUILDINGS ARE RELATED TO SEISMIC ANALYSIS, CONNECTIONS DESIGN, FIRE PERFORMANCE, AND FIRE DESIGN. WHILE THE MAIN LIMITATIONS ARE RELATED TO SOCIAL SUSTAINABILITY, THE RESULTS ARE NOT CONCLUSIVE DUE TO THE LOW NUMBER OF PUBLICATIONS THAT SUPPORT THEM.

MULTI-STOREY RESIDENTIAL BUILDINGS IN CROSS-LAMINATED TIMBER ARE EMERGING AS A SUSTAINABLE AND PROFITABLE OPTION WITH INDUSTRIALIZATION POSSIBILITIES, THAT OPEN THE WAY TO NEW PARADIGMS IN CONSTRUCTION. IN THIS NEW BUILDING MODEL, THE STANDARDIZED MODULATION RESULTS IN AN EFFICIENT STRATEGY TO INTEGRATE DESIGN AND MANUFACTURING PLATFORMS. HOWEVER, THE APPLICATION OF THIS STRATEGY REQUIRES THE STUDY AND DEVELOPMENT OF METHODOLOGIES THAT ACHIEVE THE NECESSARY DESIGN FLEXIBILITY TO OBTAIN ADEQUATE LEVELS OF PRODUCTION AND CUSTOMIZATION. BASED ON THIS, THIS WORK ANALYZES THE MODULARITY CONDITIONS OBSERVED IN FIVE BUILDINGS BUILT BETWEEN 2002 AND 2016, IN ORDER TO STUDY THE STANDARDIZATION CRITERIA IMPLEMENTED. TO ACHIEVE THIS, AN ANALYSIS IS MADE OF THE UNDERLYING MODULARITY IN THE DESIGN AND THE CONDITIONS OF VARIATION OR REPETITION PRESENTED. IN THIS SENSE, THE USE OF DIFFERENT MODULARITY CRITERIA WAS OBSERVED BETWEEN THE FIRST EXPERIENCES DEVELOPED AND THE MOST RECENT BUILDINGS, GIVEN BY THE TECHNOLOGICAL PROGRESS OF RECENT YEARS. THE RESEARCH ALLOWS US TO APPROACH THE UNDERSTANDING OF THE MODULARITY CONDITIONS ASSOCIATED WITH THESE BUILDINGS, AS A CONTRIBUTION TO THE DEVELOPMENT OF METHODOLOGIES THAT OPTIMIZE THE DESIGN FOR MANUFACTURING AND ASSEMBLY.

HOUSING IN MODERN SOCIETIES IS A PRIORITY NEED. IN THE COUNTRIES OF INDUSTRIAL DEVELOPMENT, THERE ARE VERY SHARP CONTRASTS WITH RESPECT TO THE HOUSING DEFICIT, AFFECTING THE GREAT MAJORITY OF THE FAMILIES WITH LOWER ECONOMIC RESOURCES THAT SOLVE THEIR PROBLEM THROUGH SUBHUMAN CONSTRUCTIONS, ELABORATED, MOSTLY, WITH RESIDUES OF CONSTRUCTION AND DISASSEMBLY OF OLD BUILDINGS, HIGHLIGHTING THE IMPORTANCE OF THE ECONOMY, FROM THE FINANCIAL POINT OF THE HOUSE BUILT ON THE ARCHITECTURAL QUALITY AND COMFORT.. THE NEED TO CREATE NEW BUILDING SYSTEMS BASED ON WOOD FOR HOMES ARISES WHEN CONSIDERING THE FEW EXISTING ALTERNATIVES IN DEVELOPING COUNTRIES THAT GUARANTEE AN ECONOMIC, MASSIVE AND FUNDAMENTALLY SUSTAINABLE CONSTRUCTION. IN THIS SENSE, THIS RESEARCH AIMS TO MAKE A CONTRIBUTION TO THE IMPLEMENTATION OF NEW STRUCTURAL ELEMENTS FOR THE SUSTAINABLE CONSTRUCTION OF WOODEN HOUSES, WHICH CAN BE MANUFACTURED BY LOW TECHNOLOGY PROCESSES, ALLOWING EASY USE AND APPROPRIATION BY THE GENERAL POPULATION. THE SYSTEM IS CALLED TENSO-WOOD, WHICH IS CONCEIVED AS A SYSTEM OF SOLID WOOD PLATES OF CARIBBEAN PINE, DEVELOPED BY MEANS OF LOW TECHNOLOGY PROCESSES THAT ALLOW AN EASY APPROPRIATION BY THE POPULATION IN GENERAL. THIS PAPER PRESENTS A FRAME STRUCTURAL SYSTEM USING TENSIONED WOOD PANELS AS STRUCTURAL ELEMENTS. IT IS A LIGHTWEIGHT PREFABRICATION SYSTEM FOR THE CONSTRUCTION OF TWO-STOREY WOODEN HOUSES. THE SYSTEM CONSISTS OF BOLTED WOOD ELEMENTS, CREATING DIFFERENT STRUCTURAL PANELS SUCH AS BEAM AND COLUMN. AN EXPERIMENTAL PROGRAM WAS CARRIED OUT, WHICH ALLOWED KNOWING THE MECHANICAL BEHAVIOR OF EACH PANEL OF THE FRAME STRUCTURE. IN ADDITION, IT PERMITS TO KNOW THEIR MAXIMUM STRESS AND DEFORMATIONS. THE NUMERICAL MODELS WERE COMPARED WITH THE EXPERIMENTAL TESTS TO VALIDATE AND CALIBRATE SOME PARAMETERS IN THE SIMULATIONS. THEREFORE, THE NUMERICAL MODELS CAN BE ABLE TO COMPUTE THE LOAD CAPACITY AND DEFORMATION OF THE WOODEN ELEMENTS, OBTAINING BEHAVIOR CURVES.