With a very lovely sun shining down upon us, we proceeded to install the final set of “P” rafters up into the roof framework. The four rafters that goes up into the very far corner (left back corner of the Great Room) and the first two rafters of five that goes into the front left corner of the building.
Rafters-P1P3-and-P4
But we discovered something wrong with the length and angle of the rafters (P4, P3 and P2). We did P4 first and realised that the angle of the Bevel cuts were incorrect, much too steep compared against the diagonal LVL hip rafter going down into the corner. We had to put in extra spacers to help fill in the gap and provide suitable structural connection. Then P3 rafter was too short by about 120mm in length and Disaster Number One, we seem to have a situation! We have a mismeasurement! When we originally measured this corner, we measured P4 and P2 and put the data into our spreadsheet and that where we got the numbers from to build these rafters. But we did something wrong somewhere and soon, we found it! the length of P2 was in error. We made the P2 rafter 1040mm long via the bottom flange but we realised that the distance from the LVL rafter down to the wall leg was actually 1400mm!! We Found It! A keyboard data entry error or perhaps a lithography error (writing into notepad!) or something! It is really the first time we have made a big mistake with a measurement during this roof phase or indeed other phases of this building project. So we abandoned P2 and finished installing P3 by inserting a large block of wood 62mm thick to fill in the gap and glue plus screws to hold everything together.
Spacer-for-P3
Rafters-P16-and-P17
We then went onto doing the front left set of rafters and this time, we managed to get up two more rafters (P16 and P17) before the next Disaster Number Two occurred!! See Tower Crashes Down! and this put an end to our day’s work. This was about 4:30pm!