Gamma Bracing GBF Frame Bracing Values

 

GBF Bracing Frame refBU’s WINDBU’s E.Q.Single StudsDouble StudsTotal widthHeight From/to max of

GBF220/2100mm

45bu’s

53bu’s

no

YES

400mm

2000/2400mm

GBF 220/2400mm

37bu’s

44bu’s

no

YES

400mm

2400/2700mm

GBF220PX/2400mm

42bu’s

50bu's

no

YES

400mm

2400/2700mm

GBF400SX/2100mm

51bu's

63bu's

YES

no

445mm

2000/2400mm

GBF400/2400mm

45bu's

55bu's

YES

no

445mm

2400/2700mm

GBF400/2700mm

40bu's

40bu's

YES

no

445mm

2700/3000mm

GBF400/3000mm

35bu's

40bu's

YES

no

445mm

3000/3300mm

GBF450SX/2100mm

65bu's

74bu's

1LHS + 2RHS

1LHS + 2RHS

490mm

2100/2400mm

GBF450/2400mm

57bu's

65bu's

1LHS + 2RHS

1LHS + 2RHS

490mm

2400/2700mm

GBF450/2700mm

50bu's

57bu's

 1LHS + 2RHS

 1LHS + 2RHS

490mm

2700/3000mm

GBF450/3000mm

45bu's

52bu's

1LHS + 2RHS

1LHS + 2RHS

490mm

3000/3300mm

GBF535SX/2100mm

79bu's

86bu's

no

YES

535mm 

2000/2400mm 

GBF535/2400mm

69bu's

75bu's

no

YES

535mm

2400/2700mm

GBF535/2700mm

61bu's

67bu's

no

YES

535mm

2700/3000mm

GBF535/3000mm 

55bu's

60bu's 

no

YES

535mm

3000/3300mm

GBF535/3300mm

50bu's

55bu's

no

YES

535mm

3300/3600mm

GBF600SX/2100mm

90bu's

90bu's

YES

no

645mm

2000/2400mm

GBF600/2400mm

84bu's

90bu's

YES

no

645mm

2400/2700mm

GBF600/2700mm

70bu's

70bu's

YES

no

645mm

2700/3000mm

GBF600/3000mm

55bu's

60bu's

YES

no

645mm

3000/3300mm

GBF600/3600mm

46bu's

50bu's

YES

no

645mm

3300/3600mm

 

 

 

 

Garage Door Bracing Systems

 

Garage System Ref GBF Type

GBF BU's Each

Minimum Stud Requirement Each Side of Garage Door

Total Bracing Width Each Side

Height Of Top Plate From F.L.

Total BU's For System

 WindEQ WindEQ

GBF220S/220S

45

53

2

220mm

2100mm

90

106

GBF220/220/

39

44

2

220mm

2400mm

78

88

GBF220P/220P

42

50

2

220mm

2400mm

84

100

GBF400S/400S

51

63

1

445mm

2100mm

102

106

GBF400/400

45

55

1

445mm

2400mm

90

110

GBF400/400

40

48

1

445mm

2700mm

80

96

GBF400/400

35

40

1

445mm

3000mm

70

80

GBF450/450

65

74

1+2

490mm

2100mm

130

158

GBF450/450

57

65

1+2

490mm

2400mm

114

130

GBF450/450

50

57

1+2

490mm

2700mm

110

114

GBF535S/535S

79

86

2

535mm

2100mm

158

172

GBF535/535

69

75

2

535mm

2400mm

138

150

GBF535/535

61

67

2

535mm

2700mm

122

134

GBF535/535

55

60

2

535mm

3000mm

110

120

GBF600S/600S

90

90

1

645mm

2100mm

180

180

GBF600/600

84

90

1

645mm

2400mm

168

180

GBF600/600

70

70

1

645mm

2700mm

140

140

GBF600/600

55

60

1

645mm

3000mm

110

120

 

 

 

 

Combinations of GBF Types - Typical Systems See Below

 

Garage System Ref GBF TypeGBF BU's EachMinimum Stud Requirement Each Side of Garage DoorTotal Bracing Width Each SideHeight Of Top Plate From F.L.Total BU's For System
 WindEQ WindEQ

GBF200/600

39+84

44+90

2

220mm + 645mm

2400mm

123

134

GBF400/600

45+84

55+90

1

220mm + 645mm

2400mm

129

145

GBF200/535

39+69

44+75

2

45mm+535mm

2400mm

108

144

 

Or any other design combination to meet design and bracing required 

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