Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch.
Rafter spacing for polycarbonate roofing.
A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel.
2 drill posts and set on pins.
I have a pergola measuring 16 4 by 15 2.
Looking for advice on rafter spacings on a lean to storage shed on the side of my house.
Installation advice polycarbonate roofing.
Rafter spacing is based on the width of the metal roofing panels.
To cover the remaining 3 feet they cut 4 foot sections and placed them under the 12 foot sheets.
Back to base cap pricing page rafter load support chart.
Set 8 x 3 8 bolt about 3 deep into poured concrete for post anchors.
Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.
Attach 2 x 6 rafter hangers to header then attach header to house studs with lag screws.
For curved structures the maximum purlin spacing should be 750mm and a minimum radius of 6000mm for roma and greca profile and 14000mm for trimdek profile.
Wider panels allow for greater spacing between rafters.
The 16mm polycarbonate roofing system i plan on using suggests 1050mm bar centres are ok but looking at various span tables available it apears i ll still need between 4x2 and 5x2 600mm centres to withstand wind and snow etc.
Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.
1 post foots should be approximately 14 deep and 12 across.
There are several variables to consider when determining the proper rafter size.
For walls nogging spacings should be no more than 1200mm.
On center of framing base is 49 16 25mm x wall chart for 80 plus lb.
Wood posts may also be secured with 4 angle brackets.
Snow wind load position attach for mid sheet attachment.
Joist spacing for carport roof 10mm twinwall.
For roofing purlin batten spacings should be3 no more than those shown in table x maximum purlin spacings.
Finish the edge of the roof with an f proļ¬le which can be secured to the rafter or barge board with screws.
Ensure the purlin spacing is not greater than 1 500mm.
Creosote frame gate and fence.
This sizing guide for roof rafters will help determine what you need for your small project.
I recently replaced the original polycarbonate roofing suntuf using 26 inch by 12 foot pieces.
