Table III. Approximate Weight Of Fireproof Floors. (Exclusive Of Partitions.)

Depth of I Beams.

Weight. Lb. per Sq.Ft. Including Beams.

Brick Arch.

Hollow Tile.

8

74

63-74

9

71

65-80

10

81

68- 81

12

94

71- 93

15

113

91-113

Semi-fireproof floors, supported upon I beams placed 5 ft. apart crossed every 4 ft. with heavy T's, constructed of buckled plates J in. thick and covered with 6 in. of concrete composed of broken stone and cement, imbedding sleepers to which 1 in. finished floor is secured, weigh, approximately, 95 lb. per sq. ft.

Table IV. Weight Of Fireproofing Materials

Kind.

Span.

Thickness. In.

Weight. Lb. per Sq. Ft.

Dense-tile flat arch .......

4- 7

6-12

22-42

Porous-tile flat arch.......

3-10

6-15

21-43

Dense-tile partition ......

3- 6

15-28

Porous-tile partition......

3- 6

14-27

Porous-tile ceiling.........

2- 4

12-20

Porous-tile roofing.........

2- 4

12-20