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Physical Properties of Strand For Prestressed Concrete
StrandSize	Grade	Minimum Diameter	Nominal Dia in.	Maximum Diameter	Nom Steel Area in.	Load @ 1% NR (lbf)	Load @ 1% LR (lbf)	Minimum B/S (lbf)	Minimum Difference	Minimum Elongation	Diameter Tolerance
StrandSize	Grade	Minimum Diameter	Nominal Dia in.	Maximum Diameter	Nom Steel Area in.	Load @ 1% NR (lbf)	Load @ 1% LR (lbf)	Minimum B/S (lbf)	Minimum Difference	Minimum Elongation	Plus	Minus
3-Wire 250 & 270 Grade Strand For Prestressed Concrete
5/16" 250	250	0.324	0.340	0.356	0.058	12325	13050	14500	N/A	3.5%	0.016	0.016
5/16" 270	270	0.334	0.340	0.366	0.058	13311	14094	15660	N/A	3.5%	0.026	0.006
7-Wire 250 Grade Strand For Prestressed Concrete
1/4" 250	250	0.234	0.250	0.266	0.036	7650	8100	9000	0.001	3.5%	0.016	0.016
5/16" 250	250	0.307	0.313	0.329	0.058	12300	13050	14500	0.015	3.5%	0.016	0.006
3/8" 250	250	0.359	0.375	0.391	0.080	17000	18000	20000	0.002	3.5%	0.016	0.016
7/16" 250	250	0.422	0.438	0.454	0.108	23000	24300	27000	0.0025	3.5%	0.016	0.016
1/2" 250	250	0.484	0.500	0.516	0.144	30600	32400	36000	0.003	3.5%	0.016	0.016
.600" 250	250	0.584	0.600	0.616	0.216	45900	48600	54000	0.004	3.5%	0.016	0.016
7-Wire 270 Grade Strand For Prestressed Concrete
5/16" 270	270	0.307	0.313	0.339	0.059	13600	14400	16000	0.015	3.5%	0.026	0.006
3/8" 270	270	0.369	0.375	0.401	0.085	19550	20700	23000	0.002	3.5%	0.026	0.006
7/16" 270	270	0.432	0.438	0.464	0.115	26350	27900	31000	0.0025	3.5%	0.026	0.006
1/2" 270	270	0.494	0.500	0.526	0.153	35100	37170	41300	0.003	3.5%	0.026	0.006
1/2" Spec 270	270	0.494	0.500	0.526	0.167	38250	40500	45000	0.003	3.5%	0.026	0.006
9/16" 270	270	0.557	0.5625	0.589	0.192	43950	46530	51700	0.0035	3.5%	0.026	0.006
.600" 270	270	0.594	0.600	0.626	0.217	49800	52740	58600	0.004	3.5%	0.026	0.006
.700" 270	270	0.694	0.700	0.726	0.294	67500	71500	79400	0.005	3.5%	0.026	0.006
7-Wire 300 Grade Strand For Prestressed Concrete
3/8" 300	300	0.369	0.375	0.401	0.085	21675	22950	25500	0.002	3.5%	0.026	0.006
7/16" 300	300	0.432	0.438	0.464	0.115	29330	31050	34500	0.0025	3.5%	0.026	0.006
1/2" 300	300	0.494	0.500	0.526	0.153	39020	41310	45900	0.003	3.5%	0.026	0.006
1/2" Super 300	300	0.494	0.500	0.526	0.167	42590	45090	50100	0.003	3.5%	0.026	0.006
.600" 300	300	0.594	0.600	0.626	0.217	55340	58590	65100	0.004	3.5%	0.026	0.006

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