Dear Geoff13,
I understand your concerns regarding support column lifting. My idea was to use a guide as per API650 requirements. Please see picture below. The guide length may be increased to be sufficient for reliable column lifting.
Dear IFRs,
I have wind girders and even additional stiffener ring please see picture below:
As I know if doing the calculation in accordance to API650 Annex F only specified and shown on the picture below compression ring details may be used.
So wind girders cannot be included in the...
Dear Geoff13,
Please advise what kind of alternative compression flange bracing system you are talking about.
Is my understanding correct that if I weld roof plates to the rafters and make non-frangible roof I will fulfill API650 requirement 5.10.4.3?
5.10.4.3 Structural members serving as...
Dear HTURKAK,
I used compression ring detail J (30mm thickness see my sketch above). Roof plate 7mm wall thickness (incl. 2mm CA) with compression ring detail J as per my sketch fulfill Appendix F API650 requirements. This approach is not easy to implement but it is cheaper than use of 25 mm...
Dear IFRs,
Regarding anchor bolts and anchor chair the calculation is done. 60 anchors 56mm diameter were selected. Uplift due to design pressure, test pressure wind, seismic and it's combinations were considered and it fulfill API650 requirements.
Dear JStephan,
You are right, 7mm roof plates thickness is not enough and it should be increased to 8mm based on API650 5.10.2.2: "Any corrosion allowance for the plates of supported roofs shall be added to the greater of the calculated thickness or the minimum thickness or [5 mm (3/16 in.) or...
Dear gents,
I did design calculation for oil storage tank based on API650 (Annex F)
Input data:
Tank’s internal diameter = 34m
Design internal pressure P= 12 kPa
Roof slope 6:1
Material: ASTM A 516 GR. 70
I calculated A (Required Compression Area, Roof/Shell Junction Area as per Section F.5)...
