How To Support 60 By 40 Roof

Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

How to support 60 by 40 roof. Gather some basic weather information to calculate the proper size for gutters and downspouts for a house. Total load psf duration factor live load psf notes. The total rainfall and how rapidly it falls will affect the runoff from the roof. Load limits on the roof of a building.

Those were only 30 tall bar joists. Per square foot for northern areas of the u s. 40 ers can be as short as 20 and give 127 plf total load. 12 x24 lean to roof plan.

Calculate the weight the beam must support. 10 x24 lean to roof plan. For rooms which are heavily frequented it may be 50 lbs. Total roof area also affects runoff.

I did a 40 span on the last house that got a 300 psf roof. Once you have this you can place beautiful outdoor furniture garden tools or anything you like under it. Details 32 by 40 foot flat roof with the ibeam spanning the 32 foot distance which will only be supported by each end no center posts. Here we have a wood framed gable roof.

In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. Just don t ever try to get em out. Remember to always switch off the power supply to the panoramic roof by setting the car s electrical system in ignition position 0 and then take the key with you when leaving the car. The roof construction currently is 2 x12 by 20 foot spruce joists on 12 centers tied to a center beam made of 3 layers 2x12 nailed togather and supported by wooden posts.

Note do not open the panoramic roof when load carriers are fitted. Let s consider a basic gable wood roof framing design. Multiply the loading per square foot by the area in square feet of the surface which the beams will be supporting. Roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 30 snow 40 20 snow 1 25 20 construction or rain not snow load 55 1 15 40 snow 47 1 15 30 snow 40 1 15 20 snow 40 1 25 20 rain or constn.

It is open to the varied elements from the sides and front. A powder actuated gun with a washer head pin will shoot down the plywood easily. Continuing on from part 3. For a flat roof with snow loading this is 25 lbs.

An inch of rain is not much but it if falls in half an hour it could flood a gutter. Roofs are under a lot of pressure. Theseoverallspansarebasedonnds 01 with 4 nominal bearing each end 24 o c. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

8 x24 lean to roof plan.