K Residence (Steel Structure Study 02)

Location: Hayama,Kanagawa

Year: 2018

Status: built

Context: Architecture

Structural design: Ohno Japan

Construction: Sekiwa Construction Co., Ltd.

Usage: Residence

Floor area: 145 m²

Client: Private

Photographers: Shunsuke Shiga / PK.P

This is a single-story residence built on an excavated, developed plot of land on a mountain.

The main structure is a steel frame, with a long rectangular plan (5400mm x 29120mm) extending from northwest to southeast.

The space is characterized by eight RC (reinforced concrete) shear walls running parallel along the northeast side. These walls are structurally detached from the roof; slender steel posts rise from the top of the walls to support the steel purlins. The gap between the walls and the roof is enclosed with glass, forming clerestory windows that bring in stable light.

The southwest side is supported by slender 60x60mm steel columns, and the structural elements (columns and walls) are designed to be minimally visible within the space.

These eight RC walls also function as partitions dividing the rooms. Only two sections (connected in a U-shape) and the gable walls at both ends form opaque exterior walls; all other exterior surfaces are glass.

The roof is composed of three elements. A "large mono-pitch roof" with deep 2730mm eaves covers the living room and kitchen, while a "small mono-pitch roof" covers the bedrooms.

Bridging these two volumes is an "asymmetrical gable roof" made of translucent laminated glass. This glass roof shelters a light-filled corridor and entrance hall that connects all rooms. Internally, corrugated polycarbonate panels are suspended as a sunshade, following the roof's geometry.

The building rests on a flatly excavated plane, aligned with the lowest (southeastern) level of the sloping site. As a result, only about half of the building's height is visible from the adjacent road on the northeast, allowing it to blend into the surrounding environment with deep eaves and an unassuming presence..

The main structure is a steel frame. The eight RC shear walls on the northeast side are detached from the roof, with slender steel posts rising from the wall tops to support the steel purlins. All vertical members, other than these shear walls, are slender 60x60mm square steel columns.
A study model showing the project's overall form, characterized by its three-part roof: a large mono-pitch, a small mono-pitch, and an asymmetrical glass gable roof connecting them.
The exterior of the single-story residence on its sloping site. All facades are glass, with the exception of the RC shear walls and end walls. Deep 2730mm eaves extend over the living and kitchen wing.
The interior is highlighted by a light-filled corridor under the translucent laminated glass roof, connecting all rooms. Corrugated polycarbonate panels are suspended below as a sunshade.