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Re: T&T: Davit Installation

D
donnieyoung1@cox.net
Sat, May 19, 2007 11:07 PM

Ron,
Good point.  Weight is about 400#.  A small hoist will definitely be required, but having even three or four people involved in that aspect would not total a lot of hours, unless they have a really slow hoist.

Don
---- Ron Rogers rcrogers6@kennett.net wrote:

How much does it weigh and how will they get it in place? A crane might
require another one or two people (a safety walker). It does seem excessive,
but you want to know how many workers are involved to get an accurate
understanding of the man-hours.

Ron Rogers

----- Original Message -----
From: donnieyoung1@cox.net

| My RPH trawler is currently in the yard being commissioned.  Part of that
commissioning is installing the 1000 pound capacity davit on the flybridge.
The flybridge sole was reinforced during manufacturing and the cable was
run.  Installation consists of bolting in place and hooking it up.
|
| Yard estimated 60 hours to install.  This seems excessive to me.  Anyone
have any experience with this type of installation?

--
Donnie Young

Ron, Good point. Weight is about 400#. A small hoist will definitely be required, but having even three or four people involved in that aspect would not total a lot of hours, unless they have a really slow hoist. Don ---- Ron Rogers <rcrogers6@kennett.net> wrote: > How much does it weigh and how will they get it in place? A crane might > require another one or two people (a safety walker). It does seem excessive, > but you want to know how many workers are involved to get an accurate > understanding of the man-hours. > > Ron Rogers > > ----- Original Message ----- > From: <donnieyoung1@cox.net> > > > | My RPH trawler is currently in the yard being commissioned. Part of that > commissioning is installing the 1000 pound capacity davit on the flybridge. > The flybridge sole was reinforced during manufacturing and the cable was > run. Installation consists of bolting in place and hooking it up. > | > | Yard estimated 60 hours to install. This seems excessive to me. Anyone > have any experience with this type of installation? > -- Donnie Young
RR
Ron Rogers
Sun, May 20, 2007 12:31 AM

Well, all I can think of is to ask the yard foreman how he came to this
estimate. If all they have to do is drill holes (sealing the holes) and
fetch and install appropriate bolts; bed the flange, plug-in or crimp and
bolt 2 or 3 wires, then 60 hours is silly. If this is a first class yard,
however, I suspect that they have included time to test the davit with the
dinghy and motor or a dead weight near the limit of the davit's rating.

Once they get it up there and bolted, you could finish it yourself.
First-class yards stand behind their work and at least one will have its
techs in a car or van and on the way to your location if something they
install fails due to that installation.

Taking these possibilities into account, I'd say that it would be a 2 person
job with a 3rd or 4th joining in during the hoisting and later in testing.

3 men x 4 hours =s 12 hours
1 electrician      =s  1 hour
2 men x 8 hours =s 16 hours
Total                        29 hours

So, if my WAG is right, you need to understand where the other 31 hours come
in. Cleanup, BTW, is included in the 2 men at 8 hours each.

IMHO,
Ron Rogers

----- Original Message -----
From: donnieyoung1@cox.net

| Ron,
| Good point.  Weight is about 400#.  A small hoist will definitely be
required, but having even three or four people involved in that aspect would
not total a lot of hours, unless they have a really slow hoist.
|
| Don

Well, all I can think of is to ask the yard foreman how he came to this estimate. If all they have to do is drill holes (sealing the holes) and fetch and install appropriate bolts; bed the flange, plug-in or crimp and bolt 2 or 3 wires, then 60 hours is silly. If this is a first class yard, however, I suspect that they have included time to test the davit with the dinghy and motor or a dead weight near the limit of the davit's rating. Once they get it up there and bolted, you could finish it yourself. First-class yards stand behind their work and at least one will have its techs in a car or van and on the way to your location if something they install fails due to that installation. Taking these possibilities into account, I'd say that it would be a 2 person job with a 3rd or 4th joining in during the hoisting and later in testing. 3 men x 4 hours =s 12 hours 1 electrician =s 1 hour 2 men x 8 hours =s 16 hours Total 29 hours So, if my WAG is right, you need to understand where the other 31 hours come in. Cleanup, BTW, is included in the 2 men at 8 hours each. IMHO, Ron Rogers ----- Original Message ----- From: <donnieyoung1@cox.net> | Ron, | Good point. Weight is about 400#. A small hoist will definitely be required, but having even three or four people involved in that aspect would not total a lot of hours, unless they have a really slow hoist. | | Don