It's been a long time since my last post. Well, I have been busy with the numerous revisions in my recent project - NPI Pulilan Ice Cream Plant. Now, it's almost finish and and I just need to revise few things and include the piperacks.
Things I've learned while doing the design:
1. Increase in roof height of 2.0m (from el. 6.4m to 8.4m) increases wind loading by about fifty percent. New roof trusses and truss retrofitting are smaller considering the 6.4m height than the 8.4m.
2. Retrofitting top chords without roof raising can be done by providing L-plates forming a box with the angular or wt top chord.
3. Use stitch welds for cover plating the whole length of top chord as continuous weld will cause warping of members. (50mm @ 150mm o.c.)
4. When using rafters instead of trusses, the edges can be tapered by maximum 600mm.
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