FORT RUGER MILITARY RESERVATION, ONE-UNIT ARMORY HABS HI-581-A (Fort Ruger, Building 301) HABS HI-581-A Diamond Head Crater Honolulu Honolulu County Hawaii
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FORT RUGER MILITARY RESERVATION, ONE-UNIT ARMORY HABS HI-581-A (Fort Ruger, Building 301) HABS HI-581-A Diamond Head Crater Honolulu Honolulu County Hawaii PHOTOGRAPHS WRITTEN HISTORICAL AND DESCRIPTIVE DATA HISTORIC AMERICAN BUILDINGS SURVEY PACIFIC WEST REGIONAL OFFICE National Park Service U.S. Department of the Interior 333 Bush Street San Francisco, CA 94104 HISTORIC AMERICAN BUILDINGS SURVEY FORT RUGER MILITARY RESERVATION, ONE-UNIT ARMORY (Fort Ruger, Building 301) HABS No. HI-581-A Location: Diamond Head Crater Honolulu Honolulu County Hawaii Latitude/ Longitude coordinates using NAD 83: Lat. 21.265040 Long. -157.804645 TMK: [1] 3-1-042:006 (portion) Significance: Building 301 is associated with HIARNG activities in Diamond Head crater during the Cold War, and is individually eligible for the National Register of Historic Places on a state level, as well as a contributing resource in the Fort Ruger Historic District (FRHD) with a recommended expanded context that includes the Cold War.1 This armory is associated with increased National Guard troop recruitment and readiness in the Cold War period. The building, with spaces for training, offices, and storage, is also an example of one-unit armory plans designed in this period by DAGS.2 Description The title block on the original drawings for this 1962 building provides its historic name: One- Unit Armory for the Hawaii National Guard, Fort Ruger Military Reservation. As is typical for most HIARNG buildings, at the time of its completion it was also assigned a building number, 301. This building number is still applicable today, and is used within this report when referring to the entire building. Building 301 is a single-story concrete building with a T-shaped footprint that has overall dimensions of 174'-4" x 165'-0". The stem of the “T” contains a drill hall measuring 60'-8" wide and 102'-4" long. The height of this section is about 15' from floor to the top of its low-slope gable roof. The overhang of the drill hall eaves is 3'-0". The dimensions of the section forming the top of the T (front section) are 50'-8" x 174'-4", and the height to its roof ridge is about 12’ above the floor level. The eaves of the low-slope hip roof in this section overhang the walls by 4'-6". The building’s exterior walls are constructed of concrete masonry units (CMU), labelled “concrete hollow tile” on the original drawings. The width of the CMU in the drill hall walls is 12", while the front section of the building has exterior and interior CMU walls noted as 8" and 6”, respectively. The building has a concrete foundation walls that are 13" wide in the drill hall and 8" or 9" wide in the front section of the building. The foundations walls, footings, and grade beams support a concrete slab floor about 2' to 3' above the varying grade. The front section of the building has a centered main entry bay with a roof overhang that projects an additional 4'-6". This section has a wood-framed hip roof, sheathed with 2x8 (nominal) tongue and groove boards with a 1" in 12" slope that is covered in asphalt composite 1 Engineering-environmental Management, Inc. (e2M), Historic Buildings Survey and Evaluation Report of Ten Facilities, Hawaii Army National Guard (Englewood, Colorado: author, October 2009), p. ii. 2 e2M, Ten Facilities, p. 5-7. FORT RUGER MILITARY RESERVATION, ONE-UNIT ARMORY HABS No. HI-581-A (Page 2) roll roofing. The 4x10 (nominal) rafters are exposed at the overhanging eaves and taper to about 6" at their ends, which are covered by fascia boards. The roof ridge, over the central lengthwise corridor, has six rectangular skylights at the ridge, each approximately 1'-4" x 3'-4". The side walls of the office section are 8'-10" high, constructed of 8" wide, 4" tall x 16" long CMU, topped by a reinforced-concrete bond beam. The concrete foundation wall has a chamfered top edge, forming a water table. The front section has multi-light, aluminum-frame windows, typically with two-light awning sections or two-light awning sections above a fixed light. The inset part of the central entry space measures about 10' wide and about 8' deep from the front wall plane. This inset area has a veneer of cut CMU, which is labelled “slab tile veneer” on Sheet 12 of the drawing set. The detail of the veneer on this sheet notes that the “slab tile veneer” has raked horizontal mortar joints and butted vertical ends of the units. The detail also notes the veneer is “cut in half from 7 5/8" x 15 5/8"" x 13/16";” however, the last measurement is incorrect, since the actual height of each cut veneer course is approximately 2". This corresponds to half of a typical 8x16x4 (nominal) CMU. The inner part of the veneer walls (3'-4" closest to the doors) cant or slant inward to the entry. The entry, whose opening measures 6'-0", has double, flush, wood doors. The outer part of the entry area is flanked by 2'-6" wide buttresses of weathered lava rock set in concrete mortar that is mostly not exposed. The buttresses, about 12' apart, reach from grade to the eaves and project 6'-0" from the building wall. The entry area and the three concrete steps up to it have a brown, acid-stained concrete finish. The entry area, steps, and buttresses are sheltered by a section of the roof about 32' wide, which projects 4'-6" past the edge of the building eaves and is supported by metal pipe posts. The overall entry space depth, including the stone buttresses is about 14'. The ceiling at the entry is clad in (nominal) tongue-and-groove boards. Flanking the buttresses are large planter boxes of weathered lava rock set in concrete mortar. Other entries are located at the ends of the front section and have double metal doors with louver vent transoms. Each 6'-0" doorway is centered in 8'-0" wide vestibules that are inset 5'-0" from the outer wall plane. The doorway at the northeast end is flanked by concrete cheek walls and is accessed by two concrete steps up from grade. The doorway at the southwest end is accessed by a six-step concrete stair and landing with a solid concrete railing. The drill hall section has a very low-slope (½" in 12"), front-facing gable roof, supported by 13'-10" high side walls of CMU topped by a concrete bond beam. At this section of the building, the foundation wall rises only a short distance above grade, typically 1' or less. The overhanging eaves are closed by 1x8 (nominal) tongue and groove boards. The drill hall roof has ten skylights, each measuring 4'-0" x 5'-0". Windows in this section of the building are two-light, aluminum-frame awning sash set high on the side walls in gangs of five and six. The drill hall has a large-scale door opening, 13'-9' wide, with a metal roll-up door on the northeast side. On the southwest side is a personnel doorway, protected by a cantilevered concrete canopy. The opening for these double metal doors measures 6'-0" x 7'-0". The interior layout of the Building 301 originally consisted of a single, large space in the drill hall, which has been divided by added plywood partitions and wood doors at its southeast end. A vestibule adjoining the southeast end of the drill hall opens into a 10'-0" lobby that bisects the office section transversely and leads straight to the front (main) entry. In the office section, a corridor 8'-0" wide runs longitudinally down the center to provide access to the various rooms. In the original design, this section had offices, classrooms, toilet rooms, kitchen, locker room, storage room with vault, and library. FORT RUGER MILITARY RESERVATION, ONE-UNIT ARMORY HABS No. HI-581-A (Page 3) The interior finishes of the drill hall include an acid-stained concrete floor, painted CMU walls, and four exposed steel bents supporting the roof at 20'-0" spacing. Each bent consists of a pair of I-beam posts with 6"-wide flange that support roof framing of 8"-wide I-beams with webs that taper from approximately 3' deep at the ridge to about 1' deep at the side walls. The roof deck is supported above the bents by 8"-high steel “Z” purlins, running longitudinally with 4'-0" spacing. The bents are braced by diagonal steel rods and the purlins are supported laterally by steel sag rods. The roof has ten skylights, each of which has a sliding metal cover on the interior. The awning windows of the drill hall, located high on the side walls, are fitted with ganged, hand-crank actuators. In the front section of the building, the roof framing and sheathing (2x10 tongue and groove boards) are exposed in the corridors and in some of the rooms. This framing is 4x10 (nominal) rafters with no ridge board, 2x10 (nominal) bridging between rafters about 10'-5" from the side walls, and 6x12 (nominal) hip rafters. Typical interior finishes and fixtures in the front section are acid-stained concrete floor, painted CMU walls, and fluorescent light fixtures. The vault (Room 16) has walls of reinforced concrete, rather than CMU. None of the drawings have indication of what was stored in the vault, but the floor plan shows a portable dehumidifier was specified. Interior doors are typically flush wood or flush metal, and almost all are 6'-10" high with various widths.