the seismic decoupler joint 64 also provide thermal insulation and a weather seal between adjacent stories of the building fig1 a 10 b and 10 c illustrate a front view of operation of a segment of the seismic decoupler joint 64 in the following positions 1 in its normal position fig1 a 2 when story i moves horizontally in plane to the right relative to story i 1 fig1 b and 3 when story i moves horizontally in plane to the left relative to story i 1 fig1 c horizontal in plane interstory movements are accommodated by the seismic decoupler joint 64 located between each story which prevents the transfer of any significant loads between stories of an earthquake immune curtain wall system fig1 a 11 b and 11 c illustrate a vertical section of the seismic decoupler joint 64 in the following positions 1 in its normal position fig1 a 2 when story i moves horizontally out of plane outward i e outward from the building face relative to story i 1 fig1 b and 3 when story i moves horizontally out of plane inward relative to story i 1 fig1 c horizontal out of plane interstory movements are accommodated without stressing the continuous flexible gasket 66 in the seismic decoupler joint 64 u2014 provided that the magnitude of.