hatch opening detail for standard trusses€¦ · design spacing. When this is not possible, the...
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Minera Roof Trusses Limited Five Crosses Industrial Estate, Minera, Wrexham LL11 3RD Email: [email protected] • Telephone: (01978) 758869 www.minera-rooftrusses.com Hatch Opening Detail for Standard Trusses Drawing Number: MRT-SD-20 Designer: BS5268 Last Revised: July 2016 Connect with us: Company Registration Number: 1325682 B B Ridge collar minimum 25 x 75 mm Ridge purlin minimum 50 x 100 mm Purlin minimum 50 x 100 mm HATCH OPENINGS Whenever possible, hatch openings should be accommodated within the trussed rafter design spacing. When this is not possible, the method illustrated below should be used. Common rafter 25 mm deeper than trussed rafter and birdsmouthed over wallplate. Common ceiling joist nailed to side of common rafter, side to match bottom chord of trussed rafter. B maximum is equal to twice the design truss spacing less the opening width. Trimmer minimum 50 x 100 mm Binder minimum 50 x 100 mm Purlin strut minimum 50 x 50 mm nailed to web Opening
Transcript of hatch opening detail for standard trusses€¦ · design spacing. When this is not possible, the...
Minera Roof Trusses LimitedFive Crosses Industrial Estate, Minera, Wrexham LL11 3RD
Email: [email protected] • Telephone: (01978) 758869
www.minera-rooftrusses.com
Hatch Opening Detail for Standard Trusses
Drawing Number: MRT-SD-20Designer: BS5268Last Revised: July 2016
Connect with us:
Company Registration Number: 1325682
B
B
Ridge collar minimum 25 x 75 mmRidge purlin minimum
50 x 100 mmPurlin minimum 50 x 100 mm
HATCH OPENINGS Whenever possible, hatch openings should be accommodated within the trussed rafter design spacing. When this is not possible, the method illustrated below should be used.
Common rafter 25 mm deeper than trussed rafter and birdsmouthed over wallplate.
Common ceiling joist nailed to side of common rafter, side to match bottom chord of trussed rafter.
B maximum is equal to twice the design truss spacing less the opening width.
Trimmer minimum 50 x 100 mm
Binder minimum 50 x 100 mm
Purlin strut minimum 50 x 50 mm nailed to web
Opening
