jji-joist technical bulletin AWS
JJI-JOIST TECHNICAL BULLETIN SUBJECT: JJI-Joist Roof Details
Bulletin Number:
Date Issued:
19
02.06.2004
Sheet 1 of 6
R1
BEARING LENGTHS Minimum End Bearing
Minimum Intermediate Bearing
89mm*
45mm*
* Minimum bearing required by JOIST DESIGN. Consult Building/Roof Designer for building stability requirements.
Detail R1 – Bearing Lengths
R2
BIRDSMOUTH CUT Permitted at low end of joist only
Bevelled ply/timber web stiffener each side of JJI-Joist web. Fix in accordance with detail F22
Bevelled ply/timber web stiffener each side of JJI-Joist web. Fix in accordance with detail F22 JJI-Joist flange must bear fully on plate* For overhang details, see detail R5
Detail R2 – Birdsmouth Cut
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details Sheet 2 of 6
R3
Bulletin Number:
19
Date Issued:
02.06.2004
BEVELLED SUPPORT PLATE FOR PITCHES UP TO 45 JJI-Joist or Kerto LVL blocking panel (See R10 for ventilation holes)
Detail R3 – Bevelled Support Plate for pitches up to 45°
R4
ADJUSTABLE SEAT CONNECTOR FOR PITCHES 15 - 45 JJI-Joist or Kerto LVL blocking panel (See R10 for ventilation holes)
Approved connector, eg Cullen ACE or Simpson VPA
Detail R4 – Adjustable Seat Connector for pitches 15° to 45°
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT: JJI-Joist Roof Details Sheet 3 of 6
R5
Bulletin Number
Date Issued:
19
02.06.2004
LOOSE TIMBER OVERHANGS
Detail R5 – Loose Timber overhang
R6
DOWNSTAND RIDGE BEAM
Detail R6 – Downstand Ridge Beam
Reference Number: TB 19
Issued By : - Kevin Keith Inglis McKenzie BEngB.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details
Bulletin Number
Date Issued
19
02.06.2004
Sheet 4 of 6
R7
FLUSH RIDGE BEAM
Detail R7 – Flush Ridge Beam
R8
OPENING IN ROOF
Detail R8 – Opening in Roof
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details
Bulletin Number:
Date Issued:
19
02.06.2004
Sheet 5 of 6
GABLE LADDER
R9
Gable wall panel
Alternatively, gable ladder to be made from JJI-Joists.
Detail R9 – Gabel Ladder
R10
BLOCKING & VENTILATION HOLES
1/ 1/ 1/ 3 3 3 1/ 2 1/ 2
2/ 3
Maximum permissible ventilation hole in JJI-Joists 2/3 of web depth
Kerto LVL blocking panels may be site trimmed to match JJI-Joist depth at outer edge of wall or positioned on Support by Simpson TB wall to match JJI-Joist depth or Cullen TJS straps
Maximum permissible V-cut for ventilation 1/ 1/ 1/ 3 3 3 1/3 1/3 1/3
Maximum permissible hole zone for round, square or rectangular holes
Detail R10 – Blocking and Ventilation Holes
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details
Bulletin Number:
Date Issued:
19
Sheet 6 of 6
02.06.2004
R6
R8
R1
R2
R7
R3
R10 R1 R6
Temporary Bracing Details
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
Bulletin Number:
Date Issued:
19
02.06.2004
Sheet 1 of 6
R1
BEARING LENGTHS Minimum End Bearing
Minimum Intermediate Bearing
89mm*
45mm*
* Minimum bearing required by JOIST DESIGN. Consult Building/Roof Designer for building stability requirements.
Detail R1 – Bearing Lengths
R2
BIRDSMOUTH CUT Permitted at low end of joist only
Bevelled ply/timber web stiffener each side of JJI-Joist web. Fix in accordance with detail F22
Bevelled ply/timber web stiffener each side of JJI-Joist web. Fix in accordance with detail F22 JJI-Joist flange must bear fully on plate* For overhang details, see detail R5
Detail R2 – Birdsmouth Cut
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details Sheet 2 of 6
R3
Bulletin Number:
19
Date Issued:
02.06.2004
BEVELLED SUPPORT PLATE FOR PITCHES UP TO 45 JJI-Joist or Kerto LVL blocking panel (See R10 for ventilation holes)
Detail R3 – Bevelled Support Plate for pitches up to 45°
R4
ADJUSTABLE SEAT CONNECTOR FOR PITCHES 15 - 45 JJI-Joist or Kerto LVL blocking panel (See R10 for ventilation holes)
Approved connector, eg Cullen ACE or Simpson VPA
Detail R4 – Adjustable Seat Connector for pitches 15° to 45°
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT: JJI-Joist Roof Details Sheet 3 of 6
R5
Bulletin Number
Date Issued:
19
02.06.2004
LOOSE TIMBER OVERHANGS
Detail R5 – Loose Timber overhang
R6
DOWNSTAND RIDGE BEAM
Detail R6 – Downstand Ridge Beam
Reference Number: TB 19
Issued By : - Kevin Keith Inglis McKenzie BEngB.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details
Bulletin Number
Date Issued
19
02.06.2004
Sheet 4 of 6
R7
FLUSH RIDGE BEAM
Detail R7 – Flush Ridge Beam
R8
OPENING IN ROOF
Detail R8 – Opening in Roof
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details
Bulletin Number:
Date Issued:
19
02.06.2004
Sheet 5 of 6
GABLE LADDER
R9
Gable wall panel
Alternatively, gable ladder to be made from JJI-Joists.
Detail R9 – Gabel Ladder
R10
BLOCKING & VENTILATION HOLES
1/ 1/ 1/ 3 3 3 1/ 2 1/ 2
2/ 3
Maximum permissible ventilation hole in JJI-Joists 2/3 of web depth
Kerto LVL blocking panels may be site trimmed to match JJI-Joist depth at outer edge of wall or positioned on Support by Simpson TB wall to match JJI-Joist depth or Cullen TJS straps
Maximum permissible V-cut for ventilation 1/ 1/ 1/ 3 3 3 1/3 1/3 1/3
Maximum permissible hole zone for round, square or rectangular holes
Detail R10 – Blocking and Ventilation Holes
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
SUBJECT:
JJI-Joist Roof Details
Bulletin Number:
Date Issued:
19
Sheet 6 of 6
02.06.2004
R6
R8
R1
R2
R7
R3
R10 R1 R6
Temporary Bracing Details
Reference Number: TB 19
Issued By : - Kevin McKenzie B.Sc. (Hons)
