215
No.
36
2
Brought forward
Allow for excavating and all contingent work at back of sea-walls and refilling, consolidating and re-instating surfaces.
Provide and fix wrought iron unclimbable gates in two leaves with heavy side posts and V-shaped wing pieces, selected pattern of heavy substantial construction with locks, bolts, hinges, etc., complete in every way, as per detail, Drawing No. 10.
NOTE. The gangways connecting the valve chambers with shore are to be complete in every respect, including painting with two coats approved bitumastic paint, and the rates must cover each and every service required.
Carried to Summary. Total Bill No. 2
BILL No. 3.
4650
ft.
Lin.
1000 ft.
Lin.
100 yds. Cube
100 yds. Cube
1000
yds. Cube
PIPE LINES.
Excavate trench to give average cover of 8′ 6′′ over pipes, in harbour bottom, refill and dispose of surplus.
Two pipes laid in one trench.
Excavate trench to give average cover of 6′ 0′′ over pipes, in harbour bottom, including excavating two feet deep into what is shewn on drawing as hard." Include also for protecting the pipes in this length with 5 to 1 concrete- yds. cube per foot run.
Excavations from 10 to 15 feet below harbour bottom to a maximum depth of 50 feet below Ordnance Datum (provisional).
Do. do. to a maximum depth of 72 feet below Ordance Datum (provisional).
5 to 1 concrete deposited under water in anchor blocks, protection or foundations to pipes, where directed (pro- visional).
Allow for cutting steel sheet piling in cofferdams and other work necessary for connecting under water pipes to those in Valve Chambers.
Carried forward
£
£
d.