How does the auditorium seating installation fixed

The auditorium seating common fixed four methods: 1. Concrete: can choose directly impact drill hole, embed pull blasting nut; 2. Ceramic tile, marble: must choose glass drilling holes to the cement ground, and then use percussion drill hole, embedded pull blasting nut; 3. Wood floor: use wood drilling drilling, embed pull blasting impact drill hole nut; 4. Steel, steel plates, use electric drill to drill a 3 - first After 4 mm holes directly buy self tapping screw [ Iron screw] , the floor is 30 ~ 40 mm enough can directly benefit, buy self tapping screw fixed on the straight.