I have to disagree with you Tom. All this provision does is allow for the combination standpipe/riser rule to be applied when the water is insufficient to allow sprinklers without a pump in a building that otherwise is not required to have an automatic standpipe. All your proposal accomplishes is increase the cost burden on the owner by either forcing a larger fire pump (in spite of the earlier comment that once you have a pump a bigger one doesn't cost much more) or forcing a separate riser and the increased cost of a larger stairwell as well as the extra pipe and for no real gain. Why would you be pumping against a pump? I don't get the pipe size issue since the combination standpipe/riser needs to be calc'd for the standpipe demand. If the FD pump is being used it is pumping against a check valve and the smaller booster pump in the building will go to churn then shut off. And isn't it SOP to hook up to the FDC upon arrival. If they have failure or insufficient pressure from the building pump they just fire theirs up. Just my opinion.
On 3/7/08, Tom Duross <[EMAIL PROTECTED]> wrote: > > > The bottom line is that the automatic water supply doesn't > have to be sized for the standpipe system if it meets the provisions for > a manual/wet and satisfies the sprinklers, whether or not that water > supply is a pump or waterworks connection. > > Steve Leyton > PROTECTION DESIGN & CONSULTING > > I agree on non high-rise if the available automatic supply (street > pressure) > satisfies the sprinkler demand to allow you to carry your hose demands in > design based upon whatever residuals the street pressures allow but I just > can't see where it allows you to size a fire pump and all it's components > to > only provide the sprinkler demand of the system. I just don't think that > it > should be allowed. Sure, if it's designed based on street pressures let it > fly and they can connect a hydrant and pump and boost whatever they need > for > their lines. I think it raises design (pipe size) issues, operational > problems (first responders pumping against a pump or what if they just > head > up and connect a hose and attempt to use the building's fire pump) among > other lesser issues. I don't see where the current standard specifically > allows this but I see how it can be done under the "if it doesn't say we > can't" claim. If I was a committee person I wouldn't let this go through. > > Tom Duross > Go Red Sox > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
