(Corey, Greg)
BSC7 NE, SE, & NW HEPI Installation Progress
After consulting with Hugh about NE HEPI work from yesterday, we figured out torque values to work with (1/2" bolts we took to 67ft-lbs & set screws for the base clamps we took to only 35ft-lbs). We also decided to put (3) thick washers under the two Crossbeam->HEPI Foot bolts which interfered with the HEPI Foot vertical Adjustment Screws. (Attached is a photo of these bolts---their heads are seen inside the Crossbeam).
In the afternoon, we moved onto doing a full swap at the SE location. The original HEPI was removed, and then a new one was craned up (this one had a correctly pre-positioned Foot). The Foot was mated up with the Crossbeam (basically make sure the four bolts on top fit through holes).
This swap was smooth in a few ways. For Vertical, we were very close to having a 0.25" gap. So we used the 0.25" Shim and only had to lower the Foot very slightly. The Foot was then torqued to the Crossbeam. At this point we checked horizontal positioning of the Assembly (yesterday, the Assembly was slightly off so we had to move the HEPI Housing structure). Today, our holes lined up, so we didn't have to make any horizontal moves (thus preserving HEPI Foot range---a good thing!).
The HEPI Assy which was installed here (South East) was S/N 45.
We are now staged to do a HEPI swap on the NW Pier in the morning.
HAM HEPI Foot Positioning
We moved to Foot Positioning in the morning since the WEST crane was tied up for most of the morning (HAM12 doors). Two HEPI Feet were positioned.
Photo Captions:
1) This is a peak inside the Crossbeam where the heads of the bolts which connect to the HEPI Foot are (notice that two needed several washers as spacers to keep the bolts off of the Vertical Adjustment screws of the HEPI which are below)
2) The 0.25" Shim installed (and a shot of the Vertical Adjustment screw mentioned above)
3) Gap between HEPI Housing & Support Bracket (better than yesterday!); this is one of our on-the-fly Support Brackets which was modified by Apollo
