Outline of “AIJ Guidelines for Structural Design of Reinforced Concrete Box-shape Wall Structures with Thick Wall and Slab (Draft)”
By T. Tanuma, N. Imagawa, E. Inai, K. Kusunoki, T. Matsui and Y. Inoue
Concrete Journal, Vol.63, No.11, Nov. 2025
- Synopsis
- In February 2023, the Architectural Institute of Japan (AIJ) published the “Guidelines for Structural Design of Reinforced Concrete Box-shape Wall Structures with Thick Wall and Slab (Draft).” A reinforced concrete box-shape wall structure with thick wall and slab is a monolithic RC wall structure composed of (1) thick load-bearing walls (with thickness of 250 mm or more) and flat beams (with depth of 250 mm or more, and width not exceeding three times the wall thickness) in the longitudinal direction, (2) structural walls and wall girders in the transverse direction that satisfy the requirements of the AIJ “Standard for Structural Calculation of Reinforced Concrete Box-shaped Wall Structures,” and (3) RC slabs and the foundation structure. Buildings that adopt this structural system can achieve both high seismic resistance and open space design. This report outlines these draft guidelines.
- Keywords:
- Reinforced concrete box-shape wall structures with thick wall and slab, Thick wall, Flat wall beam, Structural planning, Structural design
