Framing A Open Roof

Framing most common types of roof gable roof.

Framing a open roof. A gambrel shed roof involves significantly more angle cuts than a gable roof but provides more storage. The two main types of substrates used with metal roofing systems are open framing and solid substrates composite or plywood. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

Measure your seat cuts. Here we have a wood framed gable roof. In conventional gable roof framing the slope of the roof is formed by rafters that run diagonally downward from the peak of the roof to the tops of the exterior walls of the building. 16 gauge purlins to secure the metal roof panels.

Finish the eaves framing after ripping the top of the subfascia with a circular saw set to 26 5 degrees i flushed the top ripped edge with the top of the plumb cut on the rafters and screwed the subfascia to the rafter tails. You should be able. Line up the square with the plumb line then rotate it 180 degrees realigning the square on the other side of the. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

Start by marking the plumb line the horizontal line that marks where the wall will meet the rafter. Continuing on from part 3. Add the length of the overhang beyond this mark and. Things you ll need 2 in 4 in 5 1 cm 10 2 cm boards 2 in 6 in 5 1 cm 15 2 cm board hammer level 8 penny nails framing square circular saw hand clamps hurricane clips roof sheathing aluminum drip edge felt paper shingles utility knife construction nails.

Typically this is done by leaving every third collar tie and removing the two in between as shown in the drawing. Let s consider a basic gable wood roof framing design. While you re at it some carpenters. The next option you can consider in opening up the ceiling frame is to remove some of the ceiling joists or collar ties while leaving the full complement of rafters in place.

A gable roof for a shed can be built with rafters with a 1 6 ridge board or using trusses. On both ends of the roof i let the subfascia run out beyond the anticipated width of the rakes.