DEMOLITION WITH BROKK A HANDBOOK Demolition > with Brokk > 1 size="-3">

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DEMOLITION WITH BROKK

DEMOLITION WITH BROKK >

DEMOLITION WITH BROKK A range of different factors influence the choice ofdemolition method or combination of methods: ?the location of the premises to be demolished?the surrounding area?the foundations or ground conditions ?the amount of work space available?the existence of local statutes and restrictions?existing environmental requirements > ?What type of equipment will result in thelowest total cost??What is the time allocated for completion? 1)High capacity equipment - high hourlycost2)Lower capacity equipment - lower hourlycostIf the conditions of contract for demolition areclearly specified,...

DEMOLITION WITH BROKK If residual waste on the site incurs a risk of infec-tion contact the appropriate Local Authority de-partment. A demolition project involves a large number oflocal and central government authorities (laws andstatutes, etc). > Since all demolition work incurs a certain elementof risk, a large number of regulations apply con-cerning: If you suspect the presence of dangerous gases orchemicals contact the Local Authority. This ap- plies particularly to radioactive waste. ?the work site itself, ?the equipment in use,?work site personnel,?safeguards against uncontrolled collapse,...

DEMOLITION WITH BROKK The advances in technology within the area of demolition have increased the need for more so-phisticated tools and equipment.The use of such equipment and tools and thelevel of safety for those using them is highly de-pendent on effective cooperation between manu-facturers, contractors and operators. Incorrect use of a tool or equipment is potentially dangerous.Manufacturers cannot be held responsible whenthe tool or equipment is used for a purpose it was not designed or intended for. > ?the tool or equipment is solely used for the typeof work it was designed for,?the tool...

DEMOLITION WITH BROKK >

DEMOLITION WITH BROKK This is facilitated through the use of a quick-hitchand hydraulic quick couplings.Hydraulic breakers demand the use of carrierswith sufficient stability (weight ratio). The crucialfactor here is that the surface the carrier is being used on is capable of bearing the load. If themethod is used for sideways demolition of highvertical walls or columns, then great care should be taken to avoid collapse on the carrier or opera-tor. > Blasting is sometimes an extremely effective demolition method for which Brokk can be anexcellent complement. By weakening the struc- ture of the...

DEMOLITION WITH BROKK When large sections of concrete must be demol-ished or when large openings are to be made, and where the use of explosives is impossible, suitablesplitting equipment can be used. This method hasa negligible effect on the surrounding environ- ment, does not create shock waves and generateshardly any dust, noise or flying fragments. The useof splitting equipment requires the predrilling of holes for insertion of the splitting cylinder orwedge. Even in the case of demolition by splitting,Brokk can be used to advantage in combination with other equipment in the preparatory and...

DEMOLITION WITH BROKK The previous chapter dealt with the manner inwhich different technical circumstances affect theselection of method. Other important factors arethe costs and the time required for each of the various methods. These must be compared in or-der to calculate and submit a tender for a demoli-tion project. Tenders within the demolition busi- ness often vary substantially.The more highly specified and detailed prelimi-nary enquiries and specifications are, the more confidently the contractor can submit a tender. Ofequal importance is a thorough inspection of theobject to be demolished....

DEMOLITION WITH BROKK Floor 150 mm/increased capacity in %Double reinforced reduced capacity in % Capacity/hLength of wall(2200 mm high, 150 mm thick)Length of wall(2200 mm high, 300 mm thick)Length of wall(2200 mm high, 500 mm thick) Foundation 2x2x1 mtime requiredWith crushersreduced capacity in % Brokk 400,5 - 1,5-- + 20- 50 Brokk 1101,5 - 2,01,0 - 1,5-+ 30- 30Brokk 1502,5 - 3,51,5 - 2,5-+ 20- 20Brokk 2504,0 - 6,03,0 - 4,00,5 - 1,5+ 30- 15Brokk 3308,0 - 11,04,0 - 5,02,0+ 30- 5 -20 h14 h8 h4 h - 10-50- 10-50- 10-50- 10-50- 10-50 The table above shows the average capacity figures for demolition...

DEMOLITION WITH BROKK >

DEMOLITION WITH BROKK >

DEMOLITION WITH BROKK During the 1960s there was a substantial boom innew construction. This large volume is now inneed of repair, reconstruction and development. Therefore, demand in this sector is likely to behigh for some time to come. Even the re-use ofbuildings of historical and cultural value demands careful partial demolition, thereby safeguardingtheir internal and external features and increasingtheir value. Renovations of this type are often very expensive and involve environmental problemsfor the work crew, neighbours and surroundings.As a rule, changes in the concrete structures ofa...

DEMOLITION WITH BROKK slight. As the sawn surfaces will be even and cutwith precision, the amount of secondary work required will be minimal.Core drilling is used for smaller holes intendedfor cable penetrations etc. and for holes in con-junction with splitting.The combination of core drilling/splitting isused for opening up larger diameters and whereholes are predrilled along the contours of a struc- ture prior to splitting. This is a relatively quietmethod which does not impact negatively on theimmediate environment. Care must be taken how- ever, to ensure that the powerful forces transmit-ted...

DEMOLITION WITH BROKK over a larger area. That is why it is possible totransport Brokk machines across sensitive sur- faces without any risk of damage to the surfacesthemselves.During demolition, when the supporting legshave been opened out, weight distributing diskscan be used if necessary. > As has been previously stated, Brokk is a demo-lition machine with great capacity. Its capacityshould be seen in direct relation to the smallnessof its dimensions and the lightness of its weight. The advantage of its smallness becomes particu-larly apparent when the demolition area iscramped and confined.For...