In the case of home
construction, it has become increasingly
common for clients to request multiple/large
windows to be placed on the southern wall or
to designate the first floor as parking
space due to ownership of multiple motor
vehicles and for efficient property use.
In such cases, until
recently, the size, placements and the likes
were restricted in the strength of the
building. Solutions to structural strength,
however, can be found with the use of the
earthquake-proof frame by Keylam, allowing
for the actualization of any building plan.
The differences in strength of one
die with reinforced opening and the other die
without any reinforcing is clear. Furthermore, when
the openings become concentrated to a side wall, the
building will be in danger of twisting during
Characteristics and Valuable Points
The earthquake-proof frames by
Keylam have prepared two types of products; BOX type
(mainly for 1st floor) for windows and
their likes, and also the GATE type (strictly for
ground floor) for parking space and entrances. By
simply installing the earthquake proof frames by
Keylam (using lag-screw bolts as shown in the
figure) into frames built through common
construction (Japanese post and beam construction)
practices, the openings can now be treated equally
as a structural wall (used by brace or structural
The earthquake-proof frames Keylam do not require
complicated structural calculation or special
technical skills, because the frames are calculated
as a brace or structural plywood.
Opening Dimension 105×150
Opening Dimension 105×240
※As the frame uses Keylam Material,
flexibility is given in the dimension and virtually
any size is possible.
Secret to the Strength
The strength in the Keylam
earthquake-proof frame is designed to withstand the
horizontal load (earthquake, wind).
When the moment diagram in the
frame is diagnosed, we can observe that the corners
of the frame receive the most stress.
BOX Type：Aramid Adhesion
GATE Type：Aramid + Bolt
The green section of the frame is
the aramid fiber and adhesive. The tensile strength
of aramid fiber is five times that of steel.
Therefore, the green section of the frame resists
the horizontal load, caused by earthquakes and