Robertson Q Decking NKX 18-18
Robertson Q Decking NKX 18-18
(OP)
I'm evaluating a Robertson Decking system that is about 30 years old. HH Robertson doesn't have, or didn't look very hard for, the load tables. Does anyone have on hand the load tables for the Robertson Q decking type NKX 18-18? If so could you provide the capacity for an 11' span and a 12' span? Thanks.
I'm aware of the property tables for this type of decking and have used that to calculate capacity, but the numbers seem low or high. Not what would be expected
I'm aware of the property tables for this type of decking and have used that to calculate capacity, but the numbers seem low or high. Not what would be expected






RE: Robertson Q Decking NKX 18-18
I looked thru my old Robertson catalogues and found the deck mentioned with section properties, some diaphragm shear values, but no span/load tables.
I also searched the ICBO reports 2739, and 1388, finding what you are looking for in 1388, page 15 of 28, Section D. The report is dated November 1980.
For the spans you mentionfor the QL-NKX 18-18 the superimposed loads with a 2.5" concrete fill are:
11' - 203 psf, and
12' - 186psf.
Get a copy of the ICBO report for your calcs. I could fax you a copy of the particular page if there were some way for us to communicate outside of this forum. Maybe thru the administrator?
Mike McCann
McCann Engineering
RE: Robertson Q Decking NKX 18-18
thanks for the information. The deck i have has a 2" concrete fill, sorry for not providing all the information. I'm not able to find the ICBO 1388 online or through the icc-es website.
RE: Robertson Q Decking NKX 18-18
Let me know what you want to do.
Mike McCann
McCann Engineering
RE: Robertson Q Decking NKX 18-18
The Q-Floor/Taproute System Technical Data Guide has the section properties listed. Do you have a copy of this?
Mike McCann
McCann Engineering
RE: Robertson Q Decking NKX 18-18
A quick question about the superimposed loads you provided. Are those the allowable Live Loads with a 2.5" concrete fill?
If so then backing that out for 2" of fill shouldn't be too difficult. Basically what i'm analyzing is the capacity of the decking subtracting the concrete since it is 30 years old and has subsequent cracking and spalling.
RE: Robertson Q Decking NKX 18-18
Mike McCann
McCann Engineering
RE: Robertson Q Decking NKX 18-18
Mike McCann
McCann Engineering
RE: Robertson Q Decking NKX 18-18