design of the high retaining walls. The depth of the pit was dictated by primarily two factors: 1) the tun nel had to be at least 40 ft (12 m) below ground at an adjoining park, and 2) the tunnel could have a slope of no more than 10%. Therefore, the pit had to be deep underground to intercept the two tunnel arcs.

• If AC duct is greater than 1200mm in length, then ensure you suspend a separate bracket under the duct and from it, a hangerwire can be suspended for ceiling installation. 300mm 45 0 45 0 300mm WIRES PLUMB: MAX. SLOPE 1 IN IN ANY PLANE IF MORE, USE COUNTER SPLAYING WIRES Step 5: Installation of Hangers Ceiling Soffit Duct Section Threaded

All excavations more than 8 feet but not more than 12 feet in depth with unsupported vertically sided lower portions shall have a maximum allowable slope of 1:1 and a maximum vertical side of 3½ feet.

Natural slope failures are commonly triggered on the hill tops and ridges as a result of topographical amplification phenomenon while the absence of this effect due to one face or valley shape pit slopes leads to increase in pit slope stability.

space that has more than 250 ft2 of window lit area. Automated Daylighting Controls for Toplighted Areas ( 5) The lamps for general lighting must be controlled by at least one multilevel daylight control in any enclosed space that has more than 900 ft2 .

Pad Dimensions. The pad for the standard outdoor service area must be at least 18′ deep and 27′ 11″ wide (Horizontally: 24'3″ for the dumpster section and 4′ for the recycling container section. Vertically: 8′ for the dumpster and 10′ for the truck.) Slope pad such .

(b)(12)(i) When materials are being passed through the hole, not more than two sides of the guardrail system are removed; and (b)(12)(ii) When materials are not being passed through the hole, the hole must be guarded by a guardrail system along .

stairway shall be sloped no steeper than one unit vertical in 48 units horizontal (2 percent slope). The greatest riser height within any flight of stairs shall not exceed the smallest by more than 3/8 inch. The greatest tread depth within any flight of stairs shall not exceed the smallest by more than 3/8 inch.

However, there may be instances in which the ground conditions at a mine present a particular hazard. In such situations, more than one bench above the area where miners work or travel must be maintained in a condition adequate to retain material that may come onto the bench from the wall, bank, or slope.

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angle of not more than 45 degrees with the vertical. WASTE PIPE: A waste pipe is a pipe which conveys only liquid waste free of fecal matter. Rainwater Harvesting Requirements General Every building proposed for constructing on plots having extent of 300 sqm or above shall have facilities for

"The increase in the T3 open pit Ore Reserve is significant for MOD, our supportive shareholders and people in the Ghanzi District. The proposed six stage open pit mine and 3Mtpa conventional processing plant is expected to produce highmargin, highquality copper concentrates for more than 11 years. This should generate strong

DESIGN OF TRENCH SLOPES. The OSHA classification for most soils is type B at best, and some would argue for a type A classification. If OSHA were the only guideline, then most open cuts would be laid back on a to 1V slope. That can unnecessarily increase .

abutment protection on larger streams and rivers having design discharges generally greater than 50 cfs. For small discharges, procedures presented in Chapter 8 Channels should be used. Emphasis in this chapter has been placed on rock riprap revetments due to their costs, environmental considerations,

zontal drain line less than 5 feet (1524 mm) in length unless such line is serving sinks or urinals. (2) Cleanouts shall be permitted to be omitted on a hori zontal drainage pipe installed on a slope of 72 degrees ( rad) or less from the vertical angle (onefifth bend). (3) .

the unconfined compressive strength or cementation requirements of Type A soils but are fissured or subject to vibration; dry unstable rock; and layered systems sloping into the trench at a slope less than 4H:1V (only if the material would be classified as a Type B soil).

Excavations with face more than m high (1) Subject to subclause (2), every employer must, so far as is reasonably practicable, ensure that, where any face of any excavation is more than m high, that face is shored. (2) Subclause (1) does not apply where— (a) the face is cut back to a safe slope; or

GUIDE TO TRENCH EXCAVATIONS (SHORING SUPPORT AND DRAINAGE MEASURES) ... watercarrying buried services should not be placed in a slope nearer to the crest of the slope than a horizontal distance equal to its vertical height. If it is unavoidable to lay ... not more than 100 m long.

Generally, minimum slope for water to run off is 1% (1/8" per 1'). However, minimum slope for a flat roof by building code here is 2%. (1/4" per 1'). You have more than enough slope for your roof, however you will likely need some sort of membrane roofing since it is very low slope.

Turnstiles more than 39 inches (991 mm) high shall meet the requirements for revolving doors or the requirements of Section for security access turnstiles. [BE] Additional door. Where serving an occupant load greater than 300, each turnstile that is not portable shall have a sidehinged swinging door that conforms to Section within 50 feet (15 240 mm).

The parking area will then slope down toward the dock. Ideally, this slope should be 6%, or less. If heavy loads will be handled, slope should be no more than 35%. However, if space does not permit, you may increase the slope to an absolute maximum of 10%, and this will work only for light loads. Steep