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Fire-resistance Rating and Field Sound Transmission Classification (FSTC) of the "Hambro Floor-Ceiling Assembly" designated by ULC or cUL Listing as Design No. I506 (Unrestrained Assembly Rating)
Design I506

Concrete Slab Thickness (mm)

Fire-resistance RatingFootnote (1) (h)

Field Sound Transmission Class (FSTC)

H Series joistsFootnote (2)

65

2

53

90

3

53

LH Series joistsFootnote (2)

75

2

53

120

3

53

Fire-resistance Rating and Field Sound Transmission Classification (FSTC) of the "Hambro Floor-Ceiling Assembly" designated by ULC or cUL Listing as Design No. I518 (Restrained and Unrestrained Assembly Rating)

Design I518

Concrete Slab Thickness (mm)

Fire-resistance RatingFootnote (1) (h)

FSTC

H Series joistsFootnote (2)

65

1.5

53

70

2

53

75

2

53

LH Series joistsFootnote (2)

75

1.5

53

80

2

53

85

2

53

Fire-resistance Rating and Field Sound Transmission Classification (FSTC) of the "Hambro Floor-Ceiling Assembly" designated by ULC as Design No. I800 (Restrained and Unrestrained Assembly Rating)
Restrained Assembly RatingFootnote (1) (h)

Unrestrained Assembly RatingFootnote (1) (h)

Thickness of Sprayed Fibre on D510 Joist (mm)

Thickness of Sprayed Fibre on D500 Joist (mm)

Concrete Slab Thickness (mm)

FSTC

2

—

32

29

63

53

1.5

—

32

29

70

53

—

1.5

—

38

76

53

1

1

32

29

89

53

Fire-resistance Rating and Field Sound Transmission Classification (FSTC) of the "Hambro Floor-Ceiling Assembly" Designated by UL as cUL Design No. G524 (Restrained and Unrestrained Assembly Rating)
Design

Concrete Slab Thickness (mm)

Height of Truss (mm)

Fire-resistance RatingFootnote (1) (h)

FSTC

D500 and MD2000 truss

65

150

1 and 1.5

53

70

200

1.5 and 2

53

75

150

2

53

65

250

2

53

95

200

3

53

90

250

3

53

D510 truss

80

200

1 and 1.5

53

70

200

1.5

53

70

200

2

53

Field Sound Transmission Classification (FSTC) of the "Hambro Floor-Ceiling Assembly" designated as MD2000 and D500 tested in accordance with ASTM E90-04 and classification in accordance with ASTM E413-04
Design

Concrete Slab Thickness (mm)

Height of Truss (mm) And Deck

Furring Channel

Gypsum Board

FSTC

MD2000 Truss

101.6 reinforced

203.2 with steel deck

406 mm on centre

 12.7 mm Type C

52

D500 Truss

63.5 reinforced

203.2 with plywood

406 mm on centre isolated with 12.7 mm felt pad

12.7 mm Type C

54

D500 Truss

101.6 reinforced

203.2 with plywood 165 mm fibreglass insulation

406 mm on centre

2 layers 12.7 mm Type C

63