{"2":{"_":{"2":{"6":{"4":{"3":{"3":{"3":{"4":{"_":"Mark out and break ground — Dig trial pits for the ground investigation"},"5":{"_":"Dig to formation level — Dig trial pits for the ground investigation"},"6":{"_":"Trim bottoms and clear spoil — Dig trial pits for the ground investigation"},"_":"Dig trial pits for the ground investigation (1 day, Thu 17 Dec)"},"4":{"_":"Percolation tests for the soakaway (1 day, Fri 18 Dec)"}}},"_":"Trial pits for the ground investigation, and percolation tests for the soakaway."}},"7":{"2":{"3":{"1":{"2":{"_":"Excavate and prepare — Site hoarding and security fencing"},"3":{"_":"Lay and fix — Site hoarding and security fencing"},"4":{"_":"Finish and clean — Site hoarding and security fencing · Excavate and prepare — Site access and hardstanding"},"7":{"_":"Lay and fix — Site access and hardstanding"},"_":"Site hoarding and security fencing (2 days, Wed 2 Jun to Fri 4 Jun) [critical chain]"},"2":{"1":{"_":"Finish and clean — Site access and hardstanding"},"3":{"_":"Mark out and break ground — Excavate foundation trenches"},"4":{"_":"Dig to formation level — Excavate foundation trenches"},"7":{"_":"Trim bottoms and clear spoil — Excavate foundation trenches"},"_":"Site access and hardstanding (2 days, Fri 4 Jun to Tue 8 Jun) [critical chain] · Strip and stockpile topsoil (1 day, Tue 8 Jun to Wed 9 Jun) [critical chain]"},"3":{"2":{"_":"Check levels and pegs — Pour trench-fill foundations · Set up pump and pour — Pour trench-fill foundations · Tamp, level and cover — Pour trench-fill foundations"},"3":{"_":"Excavate the runs — Below-ground drainage: foul"},"4":{"_":"Bed and lay pipe — Below-ground drainage: foul"},"7":{"_":"Fit chambers and test — Below-ground drainage: foul"},"_":"Excavate foundation trenches (3 days, Thu 10 Jun to Tue 15 Jun) [critical chain] · Pour trench-fill foundations (1 day, Wed 16 Jun to Thu 17 Jun) [critical chain]"},"4":{"1":{"_":"Excavate the runs — Surface water drainage and soakaway"},"2":{"_":"Bed and lay pipe — Surface water drainage and soakaway"},"3":{"_":"Fit chambers and test — Surface water drainage and soakaway"},"4":{"_":"Service ducts through the foundations (4 h, Fri 25 Jun)"},"_":"Below-ground drainage: foul (3 days, Thu 17 Jun to Tue 22 Jun) · Surface water drainage and soakaway (3 days, Tue 22 Jun to Fri 25 Jun) · Backfill and compact to formation (1 day, Fri 25 Jun to Mon 28 Jun) [critical chain]"},"5":{"_":"Beam-and-block floor: lay beams (1 day, Mon 28 Jun to Tue 29 Jun) [critical chain] · Beam-and-block floor: blocks and grout (1 day, Tue 29 Jun to Wed 30 Jun) [critical chain]"}},"_":"Hoarding, access and topsoil; foundation trenches and concrete; drainage, soakaway and service ducts; and the beam-and-block ground floor."},"3":{"3":{"3":{"1":{"_":"Excavate and prepare — Service trench to the boundary · Lay and fix — Service trench to the boundary"},"2":{"_":"Finish and clean — Service trench to the boundary · Excavate and prepare — Driveway: excavate and sub-base"},"3":{"_":"Lay and fix — Driveway: excavate and sub-base · Finish and clean — Driveway: excavate and sub-base"},"7":{"_":"Excavate and prepare — Driveway: block paving"},"_":"Service trench to the boundary (1 day, Wed 15 Sep to Thu 16 Sep) · Driveway: excavate and sub-base (2 days, Thu 16 Sep to Mon 20 Sep) · Driveway: edgings and channel drain (1 day, Mon 20 Sep to Tue 21 Sep)"},"4":{"1":{"_":"Lay and fix — Driveway: block paving"},"2":{"_":"Finish and clean — Driveway: block paving"},"3":{"_":"Excavate and prepare — Paths and patio"},"6":{"_":"Lay and fix — Paths and patio"},"7":{"_":"Finish and clean — Paths and patio"},"_":"Driveway: block paving (3 days, Tue 21 Sep to Fri 24 Sep)"},"5":{"1":{"_":"Excavate and prepare — Boundary fencing"},"2":{"_":"Lay and fix — Boundary fencing · Finish and clean — Boundary fencing"},"_":"Paths and patio (3 days, Fri 24 Sep to Wed 29 Sep)"}},"_":"The service trench, the driveway from sub-base to block paving, paths and patio, and the boundary fencing."},"4":{"1":{"1":{"1":{"_":"Excavate and prepare — Topsoil spread and turf"},"4":{"_":"Lay and fix — Topsoil spread and turf · Finish and clean — Topsoil spread and turf"},"_":"Heat pump base (4 h, Tue 5 Oct to Wed 6 Oct) · Boundary fencing (2 days, Wed 29 Sep to Fri 1 Oct) · Topsoil spread and turf (2 days, Fri 1 Oct to Tue 5 Oct)"}},"_":"The heat pump base, and topsoil spread and turfed."}}}}},"_":{"_":{"_":{"_":{"_":{"_":{"_":{"_":{"_":{"_":"MIRROR — Groundworker (groundworker) on spine:house-2027: what this hand WILL DO at each horizon, own work only. Each job sits at the smallest period that contains it on the clock; a job that crosses a boundary rises to the coarser rung."}}}}}}}}}}