Fuel to be loaded onto the aircraft.

The action of wind over the roof of a building will cause areas of suction that create uplift forces on the roof assembly.

see Wind Uplift.

Wind, increased in speed, moving over a structure causing negative wind pressure (suction) to be placed inside an enclosed structure, creating uplift forces (upward pull) capable of blowing off the roof. Roofs are designed to resist only certain uplift caused when high winds travel over and across the roof.

Wind load on a building, which causes a load in the upward direction.

The forces acting on the building in an upward direction, caused by wind passing around and over the building.

An upward force.

Wind moving over a structure causes negative wind pressure (suction) to be placed on a building that creates uplift forces (upward pull). Roofs are designed to resist uplift caused when high winds travel over and across the roof.

(Hydraulics) The upward pressure of water on the base of a structure or the upward pressure in the pores of a material, i.e., Interstitial Pressure.