Timbering of trenches - It is also known as shoring , consists of a temporary arrangement of boardings or poling boards, wailings and struts provided to give support to the sides of trench.
Tooled surface - In this type of surface finish continuous parallel chisel marks are produced throughout the width of the stone. The parallel corrugations or chisel ,arks are made at closer intervals rendering the surface truly planned.
Tower bolt - In this type , the bolt passes through two or three stapples attached to the base plate. The plate is screwed to inside face of door shutter and the bolt engages in a metal socket screwed to the frame.
Transmission loss - The reduction in the intensity of airborne sound that takes place during its transmission from the source to the recipient is called transmission loss.
Trap - A trap is a fitting provided in a drainage to prevent entry of foul air or gases from the sewer or drain into the building.
Travel distance - The distance from the remotest point on a floor of a building to a place of safety be it a vertical exit , horizontal exit or an outside exit measured along the line of travel.
Tread - The horizontal upper part of a step on which foot is placed in ascending or descending stairway.
Trunk sewer - It is a main sewer which receives discharges from all the smaller sewers and conveys it to a sewage treatment plant or to the point of final disposal.
Trussed partitions - In places where the provision of solid support below the sill is not possible, the wooden trussed partitions have to be employed. The weight from the trussed partition walls is borne by the side walls and thus it may be constructed quite independent of the floor.
Tuck pointing - In this , the mortar is first pressed in the raked joints and there after it is finished flush with the face of the wall.