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EFC Design 1100: Notes & Illustrations


EFC Design 1100: 7500 D.W.T. Concrete Tanker, EFC Design No. 70

EFC Design 1100
"Outboard Profile, Inboard Profile and Hold Plan, 7,500-ton D. W. Concrete Tanker"
From F. B. Webster's Shipbuilding Cyclopedia. This book also has a plan of the cargo variant, Design 1101 (q.v.). Webster was a senior architect at the EFC on loan from the Navy.

Click here for a larger copy of this plan.

Click here for similar plans from the 1920 USSB ship register: Sheet 1, Sheet 2

Click on the photographs below to prompt larger views of the same images.

S.S. Palo Alto (EFC Design 1100)
S.S. Palo Alto (Design 1100, EFC Hull 1663) on her trial trip on 10 September 1920 after construction by the San Francisco S.B. Co., Oakland, Calif. This was practically the only time she was underway under her own power. The Navy received this photo from the Shipping Board in 1929. (NHHC NH 799) (Click photo to enlarge)

S.S. Moffitt (Design 1100, Hull 1708)

Photographed on 13 March 1919 at the concrete shipyard of A. Bentley and Sons Co. at Jacksonville, Fla. Concrete shipbuilding by U.S. methods used large amounts of timber, and the concrete yards were located near plentiful timber supplies. Note also the steel reinforcing rods.

Photo No. None
Source: thecretefleet.com/blog/f/the-us-concrete-ships-of-world-war-i-ss-moffitt?blogcategory=US+-+World+War+1


S.S. Moffitt (Design  1100)
S.S. Moffitt (Design 1100)

Being launched on 28 September 1920. All of the Design 1100 concrete tankers were side launched.

Photo No. None
Source: thecretefleet.com/blog/f/the-us-concrete-ships-of-world-war-i-ss-moffitt?blogcategory=US+-+World+War+1

S.S. Moffitt (Design 1100)
S.S. Peralta (Design 1100, Hull 1662)

Being launched on 25 October 1920.

Photo No. 165-WW-491A-007
Source: U.S. National Archives, RG-165-WW


S.S. Peralta (Design 1100)
S.S. Selma (Design 1100, Hull 1716)

Being launched on 28 June 1919. Note the rows of tank tops in the deck on each side of the ship.

Photo No. None
Source: thecretefleet.com/blog/f/born-in-the-usa---concrete-ships-of-world-war-i---ss-selma?blogcategory=Myth+Buster, citing The Aberdeen Group: Concrete Construction


S.S. Selma (Design 1100)
S.S. Selma (Design 1100)

This photo was attached to the SP/ID card made at the time the ship was inspected in early 1920 by the Navy under its mobilization readiness program. She was assigned the ID number 4423 and Latham at the same shipyard at Mobile, Ala., was designated ID 4423-A. Similarly Dinsmore at Jacksonville, Fla., became ID 4351 and Moffitt became ID 4351-A.

Photo No. None
Source: U.S. Naval History and Heritage Command, Ship Histories Branch, SP/ID card


S.S. Selma (Design 1100)
S.S. Selma (Design 1100)

Underway during the brief period between her completion and the grounding at Tampico, Mexico, on 17 May 1920 that ended her seagoing career.

Photo No. None
Source: thecretefleet.com/blog/f/born-in-the-usa---concrete-ships-of-world-war-i---ss-selma?blogcategory=Myth+Buster, from N. K. Fougner,
Seagoing and Other Concrete Ships (London, 1922), page 75.

S.S. Selma (Design 1100)
S.S. Selma (Design 1100)

Aground at Tampico, Mexico, before being refloated with compressed air circa 17 May 1920. The ship in the foreground, also aground, is the steel tanker S.S. John D. Rockefeller.

Photo No. P0001.003/02-APB71#001
Source: Mariners' Museum, Newport News, Va. (catalogs.marinersmuseum.org/search?search_catalog=Archives &search_catalog=Collections&query=selma)


S.S. Selma (Design 1100) aground