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Blasting Handrails

 
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Old 05-01-2015, 05:29 PM   #1
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Blasting Handrails


Need help on how I should charge for blasting 2 " handrails . Never have blasted anything round I hear it's a pain . My question is should I charge by the hour or by the linear ft ? Also have to think about clean up and maybe using a small blast tent .Any thoughts on price or time per ft or how much could be done per hour would be great . Using a Empire 350 #5 nozzle with 210 cfm unit . A around 1300 hundred ft of hand rail with two rails 2" wide Thanks
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Old 05-01-2015, 10:23 PM   #2
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Re: Blasting Handrails


I do a lot of rails and yes, they suck. I figure them by the square ft (diameter x Pi x length) and then use my Sq ft pricing. I still do better than by the hour, but it's a lot of messing around. I've made tarp back drops to catch the overspray. I also use a #5 nozzle and fine glasa. Hope this helps!

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Old 05-01-2015, 10:44 PM   #3
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Re: Blasting Handrails


Estimate handrails as a solid surface times 2.
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Old 05-02-2015, 12:35 AM   #4
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Re: Blasting Handrails


Ok thanks guys !! So measure all pipe then then x 2 of what my square ft price is ??
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Old 05-02-2015, 12:43 AM   #5
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Re: Blasting Handrails


516 what is PI ?? Sorry
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Old 05-02-2015, 01:26 AM   #6
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Re: Blasting Handrails


I got it 516 had to Go back to school
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Old 05-02-2015, 02:22 AM   #7
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Re: Blasting Handrails


You guys think I could do 15 ft hr upper and lower 2 in rails
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Old 05-02-2015, 06:50 AM   #8
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Re: Blasting Handrails


That's not what I said. Measure the handrail space as a solid as though it was a solid wall and times it by two. So if your handrails are 36" tall and 100' long your surface area would be 36"x100'= 300sq.ft x 2 = 600sq.ft
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Old 05-02-2015, 11:26 AM   #9
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Re: Blasting Handrails


This is an upper and lower railing. No spindles, no fencing. 2" dia x 1300' length. By your math it's 8164sqft of 'round' surface area. Am I following correctly?
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Old 05-02-2015, 12:25 PM   #10
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Re: Blasting Handrails


Again, your not taking the footage of the pipe itself, but of the whole surface area of the handrail. Space between the rails. Estimate it as if it was a solid wall with two sides.
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Old 05-02-2015, 12:40 PM   #11
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Re: Blasting Handrails


Ok I got it thank you . I think this is going to be a big job . It would be nice if I could do a 100 ft a day !
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Old 05-02-2015, 01:12 PM   #12
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Re: Blasting Handrails


You should be able to. What degree of blast are they looking for? #7, #6, #10 or #5?
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Old 05-02-2015, 01:21 PM   #13
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Re: Blasting Handrails


Think # 5
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Old 05-02-2015, 01:22 PM   #14
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Re: Blasting Handrails


Well I take that back they are welding on plates between rails . It on the water
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Old 05-02-2015, 01:34 PM   #15
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Re: Blasting Handrails


There wanting a white metal blast on handrails? That's almost unheard of. What type of an environment are they in?
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Old 05-02-2015, 01:36 PM   #16
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Re: Blasting Handrails


Normally in a atmospheric service a #6 commercial blast is perfect. Also, what kind of a paint system is being applied? Zinc, Epoxy, Urethane? Or just a normal oil base alkyd?
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Old 05-02-2015, 01:54 PM   #17
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Re: Blasting Handrails


Not sure of the paint .
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Old 05-02-2015, 02:06 PM   #18
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Re: Blasting Handrails


Generally that is what dictates the needed degree of blast for any structure. If they are requiring a #5 White Metal Blast, then you'll need to figure for a lot of time and abrasive. That is the best of the best of abrasive blast cleaning and no staining is allowed. Here is a simple
visual chart to compare. This is with Grade D steel.
Attached Thumbnails
blasting handrails-imageuploadedbycontractortalk1430593574.929463.jpg  
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Last edited by painter213; 05-02-2015 at 02:09 PM.
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Old 05-02-2015, 02:14 PM   #19
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Re: Blasting Handrails


Wow ok this is good to know thank you . I was off on the Classifications . Iam Pricing the job using glass 30/60
Would you recommend another media ?
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Old 05-02-2015, 02:54 PM   #20
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Re: Blasting Handrails


Depends on what coating system is being applied, but 30/60 glass should be fine. Should give you a 2-2.5 mil profile.

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