4 References CIN-710-1023, Airfield Damage Repair Crew Training Guide Mabey Johnson User ManualTraining Guide for Command Post Bunker S
5 RRR/ADRPQS Question Describe the duties and responsibilities of the following Rapid Runway Repair (RRR)/Airfield Damage Repair (ADR) teams and state what type of equipment is necessary to perform their mission under Battle Damage Repair (BDR/RRR).A. MOS [Annex C, pg 3-C-1 and 3-C-2] B. DAT [Annex B, pg 3-B-1] C. Crater/Spall [Annexes E, F, pp 3-E-1, 3-F-1]Reference: COMFIRSTNCDINST , CH III
6 MOSMOS Selection The minimum operating strip is the smallest section of the runway required for launching and recovering an aircraft. Based upon the damage assessment data reported after an attack of the air base, the RRR command center must determine the locations of potential MOSs and estimate which one would require the lease apparent amount of time and effort to repair. The RRR command center may recommend possible MOS location alternatives to Station command center, but the Station command center will determine its final location.
7 DATDAT Damage Assessment Priorities – The Station BDR/RRR plan should provide the damage assessment priority of the various Station facilities. The Battalion should integrate those priorities in its RRR plan and DAT assignments. - Runways and taxiways, aircraft maintenance facilities, aircraft parking, loading, and refueling areas. In these areas, all craters, spalls, and UXO must be reported. - Station command and control, and communication facilities. - Key utility substations or facilities. - Medial and decontamination facilities. - POL storage and pumping facilities
8 Crater/SpallCrater/Spall Crater repairs consist of clearing debris from the crater, removing damaged pavement, backfilling the crater and installing Foreign Object Damage (FOD) cover. The debris clearing, pavement removal, and backfilling procedures are generally the same regardless of the FOD cover utilized. Spall – combination for rapid setting cements and pea grave. The recommended types of rapid setting cements are regulated set cement (Ideal Cement Company’s REG SET), or a magnesium phosphate cement (such as SET 45), or a high early strength type cement (such as PYRAMENT)
9 Contingency Operations PQS Question Describe the following methods of RRR/ADR: - Folded Fiberglass Matting (FFM) - AM-2 aluminum matting - Crushed stone repair - Crete mobile - Pave Mend
10 Contingency Operations Folded Fiberglass Matting (FFM) - This procedure, which is currently the primary MOS repair method, involves the installation of an anchored FFM over a crater which was prepared with a layer of well-compacted crushed stone. Crater preparation is essentially identical to that used with the AM-2 matting system. Again, this is the principle method of RRR employed for MOS repairs at overseas MOBs (figure 5.4). Procedural details regarding FFM installation are provided in Technical Manual T.O. 35E2-3-1.
11 Contingency Operations AM-2 aluminum matting is hand-assembled and anchored over the crater which was prepared with a layer of crushed stone. This repair surface is the most manpower intensive of the two primary RRR techniques
12 Contingency Operations Crushed Stone Repair - The specific actions which must be accomplished during the crater preparation phase of the crater repair are:Clearing debris from the crater diameter perimeter.Determining the actual crater diameter versus the apparent crater diameter, i.e., the extent of crater pavement damage/upheaval.Removing the upheaved pavement.Removing large ejecta from inside the crater, as required.Backfilling the crater with ballast rock, fill, or clean ejecta.Backfilling the crater with crushed stone.Compaction of the crushed stone.Installing FOD cover.
13 Contingency Operations The trailer-mounted crete mobile carries the cement, sand, and coarse aggregates in divided bins, mounted on the unit. The cement is carried in a separate bin, located across the rear of the unit, and the sand and aggregate are carried on each side of the unit. Water is carried in a single tank, mounted in front of the aggregate bins, and is pumped to the mix auger. Sand and aggregates are proportioned accurately by weight or volume and dropped simultaneously with a mixture of cement from the material feed system into the charging end of the mix auger/conveyor at the rear of the unit. At this point, a predetermined amount of water enters the mix auger. This action of the combined auger and paddle homogenizer mixes the ingredients and water rapidly, thoroughly, and continuously to produce a continuous flow of uniformed quality concrete.The mixing action is a continuous process that can proceed until the aggregate bins are empty. On the other hand, mixing and delivery may be stopped at any time and then started again at the will of the operator. This permits production to be balanced to the demands of the placing and finishing crews and other job requirements.
14 Contingency Operations PAVE MEND - Pavemend is a cementitious, rapid setting, semi-leveling structural repair mortar, ideal for rapid repair of roads and bridges, airport runways
15 Contingency Operations PQS Question Explain the fundamentals of a tent camp layoutReference: NAVFACINST H, ABFC View Program, High-res camp layout, DWG
20 CONTINGENCY OPSPQS Question Explain the purpose of maintaining operator logs for generators and boilers. [ref. c, ch. 2, p. 2-21; ref d, ch. 3, p 3-21.]
21 CONTINGENCY OPSDaily operators logs are kept on some equipment. The main purpose for using operating logs is to continuously record data of equipment performance.
22 CONTINGENCY OPSPQS Question Discuss the following transportable bridges. - Bailey [ref. d, p. 1-5] - Medium girder [ref. 3, pp. 1-8 thru 1-13] - Mabey Johnson [ref. j]
23 Bailey Bailey [ref. e, p. 1-5] Through-type metal truss bridge with heavy timber decking, roadway carried between two main girdersHighly mobile and versatile bridge, can span a variety of gapsTransported in 5-ton dump and 40 ton trailerQuickly assembled by manpower, 30 – 40 personnel12’6” wide, can span up to 210’ConfigurationSingle / Single bridge, 100’Double / Single bridge 140’Double / Double bridge 180’Launched and de-launched via roller system
24 BaileyAdditional bays are added to counter balance during launching and de-launchingComponentsTruss panel – form girder, 5’ x 10’ panelTransom – main support, 10” x 20’ flange beamStringer – 10’ steel beamChess – 2” x 8” x 14’ wood deckingRollers – launching & de-launchingBearing & baseRampsVarious pins, clamps, braces, tie plates, bolts, jacks, and carrying bars and tongs
25 Medium Girder Single story MGB Double story MGB Linked reinforced MGB Medium girder [ref. f, pp. 1-8 thru 1-13]MGB is a two girder deck bridge111/106Launched and de-launched via roller system and 5 ton dump Three types of MGB’sSingle story MGBDouble story MGBLinked reinforced MGBTransported to site via 5 ton dump & 40 ton trailerCrew size 24 to 32 personnel
26 Medium GirderBridge is formed with 2 main girders from a number of panels pinned togetherRoadway is formed by hanging deck units between girders and connecting ramps at each end13’ 2” wide bridge used for light vehicle loads
27 Mabey JohnsonThe LSB combines standard off the shelf equipment with a range of purpose designed special equipment to meet the expectations of modern military loads and traffic expectations.Panels —These are the main structural components of the bridge trusses. They are welded items comprising top and bottom chords interconnected by vertical and diagonal bracing. At the end of each panel, chords terminate in male lugs or eyes and at the other end in female lugs or eyes. This allows panels to be pinned together to form the bridge span. There are two different panels; a Super Panel and a High Shear Super Panel. The High Shear Super Panel is used at each end of the bridge span depending upon the loading criteria.Chord reinforcement —These are constructed in the same way as the chords of the bridge panels and are bolted to the panels to increase the bending capacity of the bridge. For the LSB a heavy chord reinforcement is used.
28 Mabey JohnsonTransoms —These are fabricated from universal beams and form the cross girders of the bridge, spanning between the panels and carrying the bridge deck. The transom is designed for the appropriate loading criteria and for LSB is designed to accommodate MLC80T/110W.Decks —Unlike wooden Bailey decks, the steel LSB decks are 1.05m x 3.05m and are manufactured using robotic welding technology. The decks are manufactured to have a long fatigue life and with durbar/checkered plate finish. The decks withstand both wheeled and tracked vehicles.Bracing —A variety of bracing members are used to connect panels to form the bridge trusses and to brace adjacent transoms to the bridge.Grillages and Ground Beams —On greenfield sites and when being used as an over bridge, ground beams are available that form an assembly which transmits all dead and live forces from the bridge into the ground. For a 40m (MLC80T/110W) bridge the ground bearing pressure is 200 kN/m2. The grillages are located on the top of the ground beams and accommodate the bridge bearings as well as the head of the ramp transom.Ramps —The slope or profile of the ramps can be adjusted to allow for the passage of a range of civilian and military traffic. The length of a standard ramp at each end of the bridge is 13.5m. The ramps are bolted to the grillages and use standard deck units supported on special transoms. These transoms can be positioned at a variety of heights depending upon the set adopted with a special ramp post. The interface between the ramp and ground is a special toe ramp unit (1.5m)
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