1 DESIGN GUIDE FIRE SPRINKLER SYSTEMS COMPARISON OF AS2118.1 2006 TO 1999
DESIGNING FIRE SPRINKLER SYSTEMS ADOPTION OF AS 2118.1 2006 The new sprinkler code was issued in 2006 and came with some controversy regarding it’s application. W hile the authors believe this new standard is an improveme nt over the previous there isno is no requirement for designers to adopt. This design guide provides a list of some of the key changes that have been adopted. For further information call Paul Verheijden on 03 9870 1217 or email
[email protected]. Adoption 1.
A S2 S2 11 11 8 .1 .1 2 00 00 6 is is n ot ot re fe fe re re nc nc e d in th e B CA CA
2.
A S2 S2 11 11 8. 8.1 2 00 00 6 ma ma y b e ad ad op op te te d as as an an a ltlt e rn rn at at i ve s ol olu titio n. n.
3.
This This alte altern rnat ativ ive e must be appr approv oved ed by the the rele releva vant nt bui build ldin ing g surve survey yor rat rather her than than the the fir fire e brigade
Water Supply
1.
New concep conceptt of maximum maximum tra transi nsitt time time for prepre-act actio ion n sys syste tem m has been been adop adopte ted d and and set at 60 secs. Som e specific systems may require a lesser value i.e. deluge systems to respond within 30sec
2.
Water suppl supplie ies s are are now expla explain ined ed in terms terms of 'rel 'relia iabl ble' e' or 'not 'not relia reliabl ble' e'
3.
Concept Concept of 'dua 'duall wat water er supp supply ly'' int introd roduce uced d and and may be requ requir ired ed by by the the cli client ent or insu insure rer, r, but is not an AS requirement
4.
4 pumps pumps are not requi require red d in in the the inst instanc ance e of of dual dual water water suppl supply y as impli implied ed in the the standard
General items 1.
Beam Beam rule rule error error - Tabl Table e 5.5 5.5.2 .2;; Uprig Upright ht and Pendan Pendantt col columns umns are are the the wrong wrong way round round
2.
Rolli Rolling ng sto stora rage ge cabi cabinet nets s to to be be grea greate terr than than 100 mm below below sprin sprinkl kler er heads heads and must 2 occupy an area < 9.0 m
3.
C o nc nc ea ea le le d s pa pa ce ce sp sp ri ri nk nk le le r r eq eq ui uir em em e nt nt s a re re no no w m o re re st st ri rin ge ge nt nt
4.
C o nc nc ea ea le le d s pa pa ce ce s 2 00 00 m m < h < 8 00 00 m m ca ca n h av av e a sk sk el ele to to n s pa pa ci ci ng ng of of fa fa st st response light hazard sprinklers as an alternative to draft stops at 15,000 mm (skeleton (skeleton spacing: 6,000 6,000 mm x 7,000 mm max.)
5.
Sprin Sprinkl kler er heads heads in now to be rate rated d for for minimu minimum m flow flow rath rather er than than minimu minimum m press pressur ure e
6.
Flexi Flexibl ble e pip pipes es are are to to be 20 DN or or gre great ater er for for lig light ht hazar hazard d and and 25 25 DN for ordi ordinary nary hazard
7.
F le le xi xib le le pi pip es es a re re no no t to be be lo ng ng er er th an an 3, 3,7 00 00 m m
8.
When perf perfor ormin ming g hydra hydraul ulic ic calcul calculat atio ions ns for for fle flexi xibl ble e pipi piping, ng, 2 elbow elbows s are are to be adde added d to the calculation as friction loss to the system
9.
Stat Static ic pres pressur sure e test test now to be 1400 1400kPa kPa or 400kPa 400kPa great greater er than than the the maximum maximum stat static ic pressure, which ever is greater
10.
A pneumat pneumatic ic pre press ssur ure e test test can can be done done on on the sys syste tem m prior prior to to wetti wetting ng the the syst system, em, at 300kPa for 30min with less than 10% loss
11.
Dimens Dimensio ions ns for for wat water er supp supply ly valve valves s are are to to be incl include uded d on the the blo block ck pla plan n
1 2. 2.
P re re ss ss ur ure ga ga ug ug e s ch ch ed ed ul ule to to be be pr pro vi vid ed ed
1 3. 3.
S ys ys te te m in in te te rf rf ac ac e d ia ia gr gra m to to be be pr pro vi vid ed ed
14.
Ordin Ordinar ary y haz hazar ard d - Slopi Sloping ng roof roof and cei ceili ling ng bays bays now incr increas ease e number number of of heads heads
www.integratedfire.com.au I:\4-IFS SYSTEM\3.0 REPORTS\3.02 DESIGN\323 DESIGN GUIDE\FIRE SPRINKLERS\33 Sprinkler Design AS2118.1 2006.wpd
9 February, 2010
2 DESIGN GUIDE FIRE SPRINKLER SYSTEMS COMPARISON OF AS2118.1 2006 TO 1999 required 15.
Residential calculations are to be of more than 200 L/min regardless of no of sprinkler heads in room of calculation
1 6.
W a t er su pp ly g ra ph to be p ro vid ed on N 1. 85 gr ap h pa pe r
17.
Light Hazard minimum sprinkler spacing increased to 2,500 mm
High Hazard 1.
N ow divid ed in to 6 ca te go ries ra th er tha n 4
2.
C ategories expanded significantly
3.
Comprehensive new decision trees have been provided to determine the hazard category according to the material being stored, height of the building, the method an d the height of the storage
4.
M axim um installation size altered
5.
K -f ac to rs h av e b ee n ex pa nd ed b eyo nd 1 1. 5 to a cc ep t t he u se o f K= 16 , 20 , 24 o r 36
6.
C o nv en ti on al sp rin kl er s n ot pe rm itt ed , s pr ay sp rin kle rs on ly
7.
S ta nd ard re sp on se sp rin kle rs are pe rm itte d o nly
8.
Incidental High Hazard storage within ordinary hazard systems is restricted to 20m
9.
A 30 % a re a p en alty o n ro ofs ex ce ed in g 9 .5 is to be ap plie d
10.
A maximum of 9 sprinkler heads beneath ducts are to be included in hydraulic calculations
11.
Mezzanine floors can have draft curtains to avoid additional heads above being included in calculation
12.
Excessive storage clearance rules adopted for >6.1m, 4 acceptable options are provided to combat this
1.
T a nk s wit h li ne rs a re to b e sp rin kle r pr ot ec te d or lo ca te d aw ay fr om
2.
T an k lin ers ar e to be bo nd ed to th e in sid e o f th e ta nk
3.
Vortex plate fittings in tanks with liners are to have a second solid plate on the bottom of the tank to prevent the liner from being draw n into the suction line
4.
In le t e xc lu sive q ua dra nt to b e in co rp ora te d
5.
T an k to be d ra in ed at 3yr an d 1 0yr afte r in sta lla tio n
6.
Diver may be used as alternative to drain provided tank and liner manufacturer agree as their warranty is at stake
2
o
Tanks
Conclusion Ad op tio n o f A S 21 18 .6 is de sir ab le as it repres en ts the lates t p hilos op hy of sp rin kle r s ystem de sig n and is more in line with overseas codes. Automatic adoption can not be applied unless the designer provides the design as an alternative to the BCA. This will be accepted by a building surveyor and the fire brigade will need to be n otified (even though they are no t required to provide their approval). Integrated Fire Services recomm ends that the design report be issued with any design so that a bod y of evidence is provided to the b uilding surveyor for the issuing of a building permit.
www.integratedfire.com.au I:\4-IFS SYSTEM\3.0 REPORTS\3.02 DESIGN\323 DESIGN GUIDE\FIRE SPRINKLERS\33 Sprinkler Design AS2118.1 2006.wpd
9 February, 2010
