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By R.E. Bartlett

Because the ebook of the 1st version in 1970, the metric (SI) procedure has develop into absolutely verified during this kingdom and inmany international locations in another country because the approach of devices in use within the civil engineering undefined. Amendments were made in thetext to take account of this, and the unique bankruptcy with regards to the changeover to metric devices has been deleted. a brand new bankruptcy has been incorporated to accommodate the more Read more...

summary: because the book of the 1st version in 1970, the metric (SI) method has turn into absolutely validated during this state and inmany nations in a foreign country because the process of devices in use within the civil engineering undefined. Amendments were made in thetext to take account of this, and the unique bankruptcy with regards to the changeover to metric devices has been deleted. a brand new bankruptcy has been integrated to accommodate the extra really expert points of apartment drainage and smaller sewerageschemes, and the chance has been taken to right a number of relatively minor blunders of the sooner version. considering that 1970 ther

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Sample text

The main chamber rings are available in diameters ranging from 900 to 2000 mm and while the shaft rings were normally 700-mm diameter, many authorities are now specifying shafts of 900-mm diameter. Chamber rings, tapers and shaft rings are supplied fitted complete with stepirons to BS 1247. 22 MATERIALS Fig. 1. Comparison of some sieve sizes in the 1962 edition of BS 410 with the two ISO Series. Similar precast units are available for the construction of house inspection chambers. These are supplied in diameters of 600, 750 or 900 mm to BS 556, complete with a concrete cover and frame, the latter forming a reducing slab over the circular chamber rings.

As much notice as possible of intention to enter upon the land for construction or any subsequent maintenance or relaying work should be given to individual owners and occupiers and to any other authority affected. The implications of the work and the programme should be discussed with the occupiers, and arrangements made for suitable access to the pipeline route for personnel and equipment…. The occupier should be advised whether the work will be completed in one operation or whether a return will be necessary for other works after the main pipelaying (CP2010).

Lamp columns and similar items of street ‘furniture’ must be protected. , must be protected from the excavated spoil; it is useful to fill these with straw or similar material before excavation starts, as this will simplify subsequent cleaning. It is not usually possible to avoid damage to land drains when excavating across fields. Pegs should be driven at ground level to mark the line of these drains as they are found, so that they can be re-laid during the backfilling of the trench. Filling of the trenches to the underside of the land drains must be well consolidated.

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