absolute roof

absolute roof

[′ab·sə‚lüt ′rüf]
(mining engineering)
The entire mass of strata overlying a subsurface point of reference.
References in periodicals archive ?
The seismic responses of prototype buildings were compared in terms of maximum absolute roof acceleration, maximum absolute roof displacement, and maximum absolute base shear force.
By comparing the model IIC with other five models, it is deduced that the maximum absolute roof displacement experienced in the IIC (0.19 m) is larger than the maximum absolute roof displacement in other five.
14) ground motion data in terms of maximum absolute roof acceleration, maximum absolute roof displacement, and maximum absolute base shear force.
Results showed that the response of IFBC-All subjected to Northrige-01 is very close to IIC-All in terms of maximum absolute roof acceleration and maximum absolute roof displacement.
Caption: Figure 8: Time history of maximum absolute roof acceleration and roof displacement.