Post Footings For Extended Roof In Bedrock

Porch decks also require larger footings than deck footings.

Post footings for extended roof in bedrock. Improperly built foundation footings unlike poorly installed gutters or gapped hardwood flooring can eventually bring down the house. Editor rich bergman footings on bedrock are as solid as they can possibly be. Put lengths of 6 rebar into each hole and set in. Drill two or three 8 dia.

The footing supports a poured in place or pre cast concrete pier which in turn supports a post. Up from the bottom of the footing. Holes for each footing about 1 deep into the rock. Most of the time we take footings for granted and usually we can.

You need concrete footings underneath a foundation to provide a base that will distribute the weight of whatever is sitting on top and on rock you need rebar to keep everything from moving or sliding off. If the deck doubles as a porch it needs to be able to support no more than 80 psf. Do this by nailing the sides of the tube to the center of a tic tac toe grid of 2x4s at the top of the hole. But i decided to forget about the concrete entirely.

If you really wanted to do more you could jack hammer away some of the rock to create a bit of a hole for the cement to form into. Then dump concrete through the tube into the bottom of the hole. I tried the hammer drill and it works more or less ok. Our building safety dept requires that if you hit bedrock then the entire footprint of the house must rest on bedrock.

This footing method involves pouring a concrete pad at least 12 thick at the base of your hole. They said concrete footings poured on the bedrock are fine. Nobody can deny the need for a good house foundation. They also require two 5 s continuous around the perimeter footings as well.

Building codes have a few things to say about foundation footings. The placement of footings and piers is dependent upon the post locations which in turn are determined by the beam and rafter spans. How to get a solid frost proof footing. Footings on bedrock and deck plan by.

We also have to pin the footings to the rock though i don t recall the specs on that. Dig down until you reach the bedrock. Most deck roofs require separate footings from the deck to support the weight of the roof throughout the seasons. Clean the rock as best as possible and frame out your footing.

For deck roof posts dig holes for the roof posts and pour cement to keep them secure. Since i planned on drilling into the rock to insert pegs as concrete anchors i figured i may as well just use post saddles and bolt them directly to the bedrock. They don t want half the house on dirt and the other half on rock. When you pour concrete footings hold the cardboard concrete form tube about 12 in.

Next set a pressure treated wood support post rated for ground contact on top of the pad and backfill the soil into the hole. On the other hand if you build on soft clay soil or if there s a soft zone under part of your foundation there can be trouble. Ground rated treated wood contains a higher concentration of preservative chemicals than normal wood and will offer increased protection from decay while buried in soil.