Roof Rafter Jacks

Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more.

Roof rafter jacks.

The tiger brand jack post super s 4 the tiger brand jack post super s 4 ft. Collar tie and beam a collar tie or beam figure 7 7 is a piece of stock usually 1 x 4 1 x 6 l x 8 or 2 x 4 fastened in a horizontal position to a pair of rafters between the plate and the ridge of the roof. It is ideal for correcting sagging floors and basement beams and providing secondary support for. Simply use the drop down to enter the pitch of the main roof the pitch of the complimentary roof and the length of the long rafter to get reliable results.

Draw a diagonal line between 9 feet the run of the main roof on the tongue of the square and 7 feet 6 inches the secondary roof run on the blade. However the trick to this process is to do it very slowly so it may take a few weeks before you get the rafter into a position where it is straight again. Move the jack in increments of one inch to allow for the roof to be able to move with it without cracking. Jacks nailed only to.

To attach the jacks level the pair by aligning the jacks to horizontal chalklines and drive two 10d galvanized common nails through each jack into rafters. What are jack rafters. Roof jacks provide a stable surface to work increasing safety and making it easier to apply roofing. Roof framing involves a lexicon all its own.

Roofing jacks provide safe platforms on slopes. It has a compression load range of 18 000 lbs. Typically install a pair of jacks for every six to eight courses. This gives the angle of the hip rafter.

For any questions see the directions at the bottom. Ideally locate a rafter below the sheathing. Thus there arehip jack raftersand valley jack rafters. A hip rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect.

Here is a closer look at common roofing terms. The easiest way to straighten rafters is to jack them into position. Jack post can adjust from 2 ft. Unit run of the hip.

You can usually feel sheathing nails which are driven into rafters through the underlayment attach a jack by driving two 16d nails never roofing nails into a rafter. Akron big moe 56 in adjustable jack post. When repairing or replacing a roof it pays to be familiar with these terms. For pricing and availability.

Akron 19 in adjustable jack post. Jack rafters are sloping beams that are progressively shorter in length and support the weight of a roof. Find my store. At its highest setting.

The cripple jack rafter is also part of a common rafter but it touches neither the ridge of the roof nor the rafter plate. For pricing and availability. A jack rafteris a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both.