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Hi Al,
They are tracks, I have not measured the guage, assuming they were most likely for a travelling crane.
They are standard gauge railroad tracks, spaced at 41 mm for accurate 1:35 scale. Tracks for a crane would be much farther apart, more near the edges of the pier, as they needed to straddle the railroad spur. This is shown on an HO model pier built using Walthers plastic kits.

Unfortunately, Walthers was cheap so the pier pilings are quite short to save styrene, forcing one to model at high tide. To the left of the pier at the rear is a carfloat apron.
This is actually the work of a woman modeler in the U.K. She plans to add stained balsa edging to the pier in this manner.

Here is their terminal building and traveling crane, which I think could reasonably be used for WW2 modeling. Note the work this fellow has done to upgrade the edge of the pier. Some of you may recognize the ship as an ancient Lindberg item. One thing I don't understand is all those loading doors on the terminal building, when the pier is too narrow to allow a trailer to back up to them.

Here's a link to Walther's waterfront page.
https://www.walthers.com/exec/page/waterfrontIf anyone is interested in some of this stuff, most of the time there will be lower prices elsewhere, although I just ordered a few items today that they had surprisingly low prices on.
This site is fairly good, but I don't care for their search function:
http://www.hobbylinc.com/This one often has the lowest prices:
http://www.modeltrainstuff.com/HO-Scale-Structures-s/1441.htmAnd I just found this one today:
http://www.aawtrains.com/For whatever reason, sometimes one store will not have the best price on all items.
This line was initially released in 1998, but has been unavailable - outside of very expensive items on eBay - for many years. I guess they decided that it had been so long they could move a lot of merchandise with a re-issue, and I'm not even sure if all of it is available yet. However, a number of German model railroad structure manufacturers also offer HO scale gantry crane kits - including a digitally-controlled operating version.
CMK offers a Europen steam crane kit in 1:35, but I find it rather ugly - mostly due to how they depict a lattice structure in shallow relief on the side of the boom, when it is in fact solid. I've never found a proto photo to verify or disprove their design. I generally like the operators cab and the counterweight, although I would have expected more fenestration. Also - that stack looks totally wrong for an allegedly steam-driven machine.

I'm wondering if all this HO infrastructure will send some of you scurrying to find all those old Lindberg 1:87 kits.
Largely unrelated, but as a teaser here are proto and model (heavily customized - most notably the access stairway and the safety railings) images related to Walther's bridge crane, used to quickly unload coal from the holds.


Even more massive, the Hulett ore unloaders were used in Great Lakes ports, and Walthers has a kit for that also. I noticed on their site that it's currently on offer for about half price. However, the photo below is not of the HO kit. It's of FOUR, scratchbuilt, N-scale (1:160) models; I can't explain the absence of ore in the hull ;-)

Now for some proto photos. The British woman is modeling the New Haven Railroad, and this is the CT state pier in New London; surprisingly, no rails of any sort here, and the photo isn't recent enough for them to have been removed / paved over. BTW - Walthers has a quite nice ready built water tower, spot on for the one in the background, for an extremely reasonable price. What would we do without those containers from China.

Here's a 1968 shot of CPR (Canadian Pacific Railway) pier B-C in Vancouver. Note the support of the gantry crane - all of the weight is carried by a single leg / rail via a heavy L-shaped structure. A second connection is made to a rail mounted off the side of the warehouse to provide balance - I would wager that there's some sort of locking mechanism to prevent the support beam detaching from the rail.

A variation of the Vancouver installion is seen in this photo I just found a few days ago of Westhaven in Berlin - did someone mention landlocked? See Google Images for much more material. The rail line has since been removed, and it's obvious that this arrangement was mandated by the pier and structure being built long before anyone ever dreamed of gantry cranes on tracks.
Charles