| Keywords |
Mass timber building; Floor structure; HVAC strategies; Ceiling height |
| Abstract |
This study proposes indoor space design strategies for mass timber buildings by integrating floor structures and HVAC strategies. CLT(cross-laminated timber) slab-based floating and raised floor systems were designed based on domestic standards and previous studies, with floor assembly consisting of a 150 mm CLT slab, 40 mm resilient material, and 60 mm concrete topping. Under a floor height of 4,200 mm, the floating floor system with ceiling-based air distribution provided a ceiling height of 2,290 mm, while the raised floor system with underfloor air distribution achieved 2,550 mm, gaining an additional 260 mm by relocating HVAC equipment into the underfloor plenum. Consequently, only the raised floor system satisfied the 2.4 m ceiling height threshold associated with occupant psychological comfort. The findings provide quantitative evidence supporting integrated decision-making in floor system selection and HVAC strategies for mid-rise mass timber buildings. |