Gamma GBF220, Technical Installation Manual

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GAMMA
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P R O O F
4.0 Gamma Bracing Software & Design Procedure
4.1 Demand
The Gamma Bracing Calculator Software has been designed to work in
conjunction with NZS3604:2011.
The Demand and Achieved sheets within the Gamma Bracing Calculator
software allow for a fast and simple way to calculate the structural bracing
requirements of a timber framed structure.
The Gamma Bracing Software is preloaded with Gamma bracing systems
values. The software allows the user to use other bracing systems. (Other
bracing system values will require loading into the designated calculation
sheets by the user – refer to terms and conditions).
It is currently acceptable to use a combination of different bracing systems
along the same bracing line. However it is not permitted to place more
than one bracing element in the same position.
Designing the structural aspects of a building require a good knowledge
and understanding of the principles of building timber framed structures.
Gamma Bracing solution V1
Instructions
Project Details
Type in the name of the owner and the property address details
including the Lot number and the DP number. Details for the Architect,
Designer and Engineer can also be added should they be required.
Calculating the Demand
Input the information of the building into the required cells. Cells
with drop down lists provide options to choose from – choosing the
“specify” option allows for a custom option or value to be loaded.
Building dimensions, roof and wall cladding weights need to be
inputted to enable a bracing demand to be calculated. Incorrect
information or information not inputted will not provide a result and a
warning notification will be indicated.
Wind demand requirements can be further refined by choosing from
the drop down lists in the Yellow panel.
36
11.0 Gamma Bracing Software Calculator - Demand
OVERVIEW
The Gamma Bracing Calculator Software has been designed to work in
conjunction with NZS3604:2011.
The Demand and Achieved sheets within the Gamma Bracing Calculator
software allow for a fast and simply way to calculate the structural bracing
requirements of a timber framed structure.
The Gamma Bracing Software is preloaded with Gamma bracing systems
values. The software allows the user to use other bracing systems. (Other
bracing system values will require loading into the designated calculation
sheets by the user – refer to terms and conditions).
It is currently acceptable to use a combination of different bracing systems
along the same bracing line. However it is not permitted to place more
than one bracing element in the same position.
Designing the structural aspects of a building require a good knowledge
and understanding of the principles of building timber framed structures.
INSTRUCTIONS
Project Details
Type in the name of the owner and the property address details including
the Lot number and the DP number.
Details for the Architect, Designer and Engineer can be also be added
should they be required.
Calculating the Demand
Input the information of the building into the required cells. Cells with
drop down lists provide options to choose from – choosing the “specify”
option allows for a custom option or value to be loaded.
Building dimensions, roof and wall cladding weights need to be inputted
to enable a bracing demand to be calculated. Incorrect information
or information not inputted will not provide a result and a warning
notification will be indicated.
Wind demand requirements can be further refined by choosing from the
drop down lists in the Yellow panel.
Gamma bracing solution V1
Job Description - what is typed here will be reproduced on print sheet.
Warning. This spreadsheet calculates
the bracing rating for the building defined.
It does not check that the building defined
complies NZS 3604 scope.
Building and roof description
How many storeys above slab or subfloor?
Foundation type
RoofH = Roof height above eaves (m)
0.00
LR = Maximum roof length (m) 0.00
WR = Maximum roof width (m) 0.00
Roof pitch (degrees)
8
Specified maximum pitch (degrees) option 0.00
Room in roof space?
Roof cladding weight
60 Specified roof cladding weight option (kg/m
2
)
0.00
Floor live load
2.00
Specified floor loading option (kPa)
2.20
Single storey building definitions
Upper or single storey details
Average exterior wall cladding weight
200
Specified wall cladding weight option (kg/m
2
)
0.00
LU = Building length (m) 0.00
WU = Building width (m) 0.00
Gross building plan area (m 2 )
0.00
HUI = Interior wall height (m) 0.00
HUE = Exterior wall height (m) 0.00
Lower storey details
Average exterior wall cladding weight
200
Specified wall cladding weight option (kg/m2) 0.00
LL = Building length (m) 0.00
WL = Building width (m) 0.00
Gross building plan area (m2) 0.00
HLI = Interior wall height 0.00
HLE = Exterior wall height 0.00
Two storey building definitions
Subfloor details
Average exterior wall cladding weight
200
Specified wall cladding weight option (kg/m2) 0.00
LS = Building length (m) 0.00
WS = Building width (m)
0.00
Gross building plan area (m2) 0.00
HS = Subfloor height 0.00
60
Wind speed
Choose which option you wish to use to specify wind speed.
(a) Specify the wind zone such as from Table 5.4 of NZS 3604.
(b) Specify the wind speed in m/sec directly in the adjacent blue cell. Wind speed = 50.0 m/sec
(c) Get the wind speed calculated in the yellow zone below as per Table 5.1 of NZS3604.
Wind Zone
Wind Region from Figure 5.1 of NZS 3604 Wind zone determined = Very High
Roughness from Section 5.2.3 of NZS 3604
Exposure from Section 5.2.4 of NZS 3604
Is it a Lee Zone - see Figure 5.1 of NZS 3604?
Topography from Section 5.2.5 of NZS 3604
Earthquake Zone from Figure 5.4 of NZS 3604
Subsoil classification from Section 5.3.3 of NZS 3604
Summary of bracing demand and resistance:
Total Wind Demand/Provided in BU's Demand Provided Demand Provided Demand Provided
Wall along direction 0 0 4 0 4 0
Wall across direction 0 0 0 0 0 0
Total EQ Demand/Provided in BU's
Demand Provided Demand Provided Demand Provided
Wall along direction
#DIV/0! 0 #DIV/0! 0 #DIV/0! 0
Wall across direction
#DIV/0! 0 #DIV/0! 0 #DIV/0! 0
Check of bracing capacity
Wall along direction
Wall across direction
Upper storey Lower storey Subfloor
OK Inadequate Inadequate
OK OK OK
HUE
WR
WU
RoofH
HUI
H
WR
WU
HS
H
(a) On slab
(b) With Subfloor
WS
HUI
WL
(a) On slab
HUE
HLE
WR
WU
RoofH
H
HUI
HUE
HLE
HS
H
WR
WU
WL
WS
RoofH
(b) With Subfloor
HL I
HL I
Two storey
Subfloor
0 to 25 degrees
Light
2 kPa
Light
A
Open
Sheltered
T1
Medium
Light
(a) Specify the wind zone such as from Table 5.4 of NZS 3604.
High
No
1
D
Yes a Lee Zone
The Gamma Bracing System provides bracing performance to resist and achieve Wind and Earthquake demands. To calculated both the Wind and
Earthquake demands Gamma Bracing Technologies Ltd has developed a spread sheet calculator that is in accordance with the requirements of the
NZS3604:2011 Standard. This section details the method of calculating both the demand and achieved requirements using the Gamma spread sheet
calculator. The Gamma Bracing Technologies Ltd spread sheet calculator can be easily downloaded from the Gamma web site
www.gammabracing.co.nz
.