Sustainable Roofing Retrofit Bristol - Building the floor structure. Week 6

Feels like real progress is happening now the floor steels are in and we're starting to put the timber work in.

Mostly joists, hangers, and layout this week. A little bit of brick work and the stone masons came in and repaired the front bay.

The mason's repairs to the bay...

A little bit more masonry work from Phil on the gable end of the extension.. We set up a couple of timbers to give Phil a line to build to. These temporary rafters actually represent the finished counter-batten line, the rafter line will be further in the building to allow for the external layer of 100mm wood fibre sarking board and 2"x2" counter battens on top.

They also put one more lintel in to replace one of the old timber lintels that had some rot in it..

Finally we did some layout using a gallows bracket that we put up in place of the ridge to find the point of intersection of the roof. We put up some string lines representing a common rafter and the hip rafters so I could work out all the ridge heights throughout the building and make a 3D model and design the steel work for the fabricators..

Gallows bracket in position of where the ridge was and will be. It has a small extra piece of timber on top cut at the roof pitch angle to represent the very tip of the theorectical meeting point of the rafters. We then put a nail in this piece right in the middle and could cast string lines off to the corners representing the hips as well as to the facia to show a common rafter line.