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Products > Load Bearing Members > PrimeJoist®

PrimeJoist®

PrimeJoist

PrimeJoist® is a revolutionary addition to the light gauge steel stud industry, producing significant economies in both design and installation when compared with conventional “C” Shaped studs. PrimeJoist’s unique configuration delivers increased strength and stiffness, minimizing or eliminating the use of built-up joist sections in floor assemblies. Available in all common floor joist depths, PrimeJoist streamlines the design and construction process. PrimeJoist’s shape is easily differentiated from the typical c-shape, enabling the selection of the most optimal member sizes to fit project conditions.

Quality

  • Increases load capacity over a standard “C-shaped” stud of the same thickness, reducing overall materials needed
  • Increased stiffness for deflection
  • Increased load capacity enables selection of optimal thickness of flooring members

Value

  • Simplified joist and floor system design
  • Lighter weight results in shipping efficiencies and easier handling
  • Provides a flat surface for attachment of door or window frame, requiring no additional track
  • No welding or fastening built-up members together
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Product Information

PrimeJoist

Material Composition

ASTM A1003/A1003M or ASTM A653/A653M, Grade 50 (340), 50ksi (340MPa) minimum yield strength, 65ksi (450 MPa) minimum tensile strength, G-60 (Z180) hot-dipped galvanized coating.

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JamStud Section Dimensions
PrimeJoist® Product Profile
Section
(All 50 ksi)		 Overall Depth Flange Width Return Lip 1 Return Lip 2 Inside Bend Design Thickness Unit Weight
D B d1 d2 R t (lbs/ft)
(in) (in) (in) (in) (in) (in)
600PJ250-33 6 2.5 0.589 0.5 0.105 0.0346 1.49
600PJ250-43 6 2.5 0.61 0.5 0.105 0.0451 1.94
600PJ250-54 6 2.5 0.633 0.5 0.105 0.0566 2.42
600PJ250-68 6 2.5 0.663 0.5 0.105 0.0713 3.04
600PJ250-97 6 2.5 0.723 0.5 0.105 0.1017 4.3
600PJ250-118 6 2.5 0.768 0.5 0.105 0.1242 5.22
600PJ350-68 6 3.5 0.663 0.5 0.105 0.0713 3.53
600PJ350-97 6 3.5 0.723 0.5 0.105 0.1017 5
600PJ350-118 6 3.5 0.768 0.5 0.105 0.1242 6.06
800PJ250-43 8 2.5 0.61 0.5 0.105 0.0451 2.24
800PJ250-54 8 2.5 0.633 0.5 0.105 0.0566 2.81
800PJ250-68 8 2.5 0.663 0.5 0.105 0.0713 3.53
800PJ250-97 8 2.5 0.723 0.5 0.105 0.1017 5
800PJ250-118 8 2.5 0.768 0.5 0.105 0.1242 6.06
800PJ350-68 8 3.5 0.663 0.5 0.105 0.0713 4.01
800PJ350-97 8 3.5 0.723 0.5 0.105 0.1017 5.69
800PJ350-118 8 3.5 0.768 0.5 0.105 0.1242 6.9
1000PJ250-43 10 2.5 0.61 0.5 0.105 0.0451 2.55
1000PJ250-54 10 2.5 0.633 0.5 0.105 0.0566 3.19
1000PJ250-68 10 2.5 0.663 0.5 0.105 0.0713 4.01
1000PJ250-97 10 2.5 0.723 0.5 0.105 0.1017 5.69
1000PJ250-118 10 2.5 0.768 0.5 0.105 0.1242 6.9
1000PJ350-68 10 3.5 0.663 0 .5 0.105 0.0713 4.5
1000PJ350-97 10 3.5 0.723 0.5 0.105 0.1017 6.38
1000PJ350-118 10 3.5 0.768 0.5 0.105 0.1242 7.75
1200PJ250-54 12 2.5 0.633 0.5 0.105 0.0566 3.58
1200PJ250-68 12 2.5 0.663 0.5 0.105 0.0713 4.5
1200PJ250-97 12 2.5 0.723 0.5 0.105 0.1017 6.38
1200PJ250-118 12 2.5 0.768 0.5 0.105 0.1242 7.75
1200PJ350-68 12 3.5 0.663 0.5 0.105 0.0713 4.98
1200PJ350-97 12 3.5 0.723 0.5 0.105 0.1017 7.07
1200PJ350-118 12 3.5 0.768 0.5 0.105 0.1242 8.59
1400PJ250-54 14 2.5 0.633 0.5 0.105 0.0566 3.96
1400PJ250-68 14 2.5 0.663 0.5 0.105 0.0713 4.98
1400PJ250-97 14 2.5 0.723 0.5 0.105 0.1017 7.07
1400PJ250-118 14 2.5 0.768 0.5 0.105 0.1242 8.59
1400PJ350-68 14 3.5 0.663 0.5 0.105 0.0713 5.47
1400PJ350-97 14 3.5 0.723 0.5 0.105 0.1017 7.76
1400PJ350-118 14 3.5 0.768 0.5 0.105 0.1242 9.44
1600PJ250-68 16 2.5 0.663 0.5 0.105 0.0713 5.47
1600PJ250-97 16 2.5 0.723 0.5 0.105 0.1017 7.76
1600PJ250-118 16 2.5 0.768 0.5 0.105 0.1242 9.44

Notes:

  1. Effective properties incorporate the strength increase from the cold-work of forming as applicable per AISI A7.2.
  2. Tabulated gross properties are based on the full-unreduced cross section of the studs, away from punchouts.
  3. Tabulated gross properties are based on the full-unreduced cross section of the studs, away from punchouts.
  4. Allowable moment is the lesser of Mal and Mad. Stud distortional buckling is based on an assumed kΦ = 0.
  5. For deflection calculations, use the effective moment of inertia.
  6. The effective moment of inertia for deflection is calculated at a stress which results in a section modulus such that the stress times the section modulus at that stress is equal to the allowable moment. AISI S100-07 Procedure I for serviceability determination has been used.
PrimeJoist® Section Properties
Section
(All 50 ksi)		 Gross Properties Effective Properties Torsional Properties Lu
Area Ix Sx Rx Iy Ry Ixe Sxe Mal Mad Vag Va(net) Jx1000 Cw Xo m Ro ß
(in2) (in4) (in3) (in) (in4) (in) (in4) (in3) (kips-in) (kips-in) (lbs) (lbs) (in4) (in6) (in) (in) (in) (in)
600PJ250-332 0.438 2.522 0.841 2.4 0.402 0.958             0.175 3.209 -2.094 1.269 3.326 0.604 53.3
600PJ250-43 0.569 3.261 1.087 2.394 0.519 0.955 3.239 0.919 27.5 23.66 1,432 1,235 0.386 4.15 -2.088 1.266 3.317 0.604 53.3
600PJ250-54 0.712 4.058 1.353 2.387 0.644 0.951 4.058 1.174 35.14 32.38 2,843 1,942 0.76 5.163 -2.082 1.263 3.307 0.604 53.4
600PJ250-68 0.894 5.055 1.685 2.378 0.801 0.947 5.055 1.526 45.68 44.25 5,350 2,882 1.514 6.431 -2.074 1.259 3.295 0.604 53.5
600PJ250-973 1.265 7.047 2.349 2.361 1.111 0.937 7.047 2.305 77.07 76.03 10,653 3,964 4.36 8.956 -2.058 1.25 3.269 0.604 53.8
600PJ250-1183 1.533 8.447 2.816 2.348 1.327 0.93 8.447 2.816 95.91 95.91 12,905 3,888 7.855 10.726 -2.045 1.244 3.25 0.604 54.1
600PJ350-68 1.036 6.309 2.103 2.467 1.799 1.318 6.023 1.628 48.76 47.85 5,350 2,882 1.756 14.285 -3.006 1.771 4.106 0.464 71.5
600PJ350-97 1.468 8.816 2.939 2.451 2.513 1.308 8.729 2.534 75.86 77.71 10,653 3,964 5.061 20.02 -2.99 1.763 4.081 0.463 72
600PJ350-118 1.781 10.588 3.529 2.438 3.017 1.302 10.588 3.341 100.02 100.89 12,905 3,888 9.127 24.09 -2.978 1.757 4.063 0.463 72.5
800PJ250-43 0.659 6.378 1.595 3.11 0.572 0.931 6.368 1.225 36.66 32.25 1,060 1,060 0.447 7.513 -1.869 1.159 3.746 0.751 52.3
800PJ250-54 0.825 7.949 1.987 3.103 0.71 0.927 7.949 1.7 50.89 44.46 2,102 2,102 0.881 9.34 -1.862 1.156 3.736 0.752 52.2
800PJ250-68 1.036 9.923 2.481 3.095 0.883 0.923 9.923 2.26 67.68 61.31 4,219 3,368 1.756 11.624 -1.854 1.151 3.724 0.752 52.2
800PJ250-973 1.468 13.893 3.473 3.076 1.225 0.914 13.893 3.409 113.95 106.91 10,885 6,032 5.061 16.161 -1.838 1.142 3.698 0.753 52.2
800PJ250-1183 1.781 16.707 4.177 3.063 1.464 0.907 16.707 4.177 142.27 140.45 16,235 7,312 9.127 19.33 -1.825 1.136 3.679 0.754 52.3
800PJ350-68 1.179 12.165 3.041 3.212 1.99 1.299 11.749 2.406 72.03 65.37 4,219 3,368 1.998 25.787 -2.733 1.648 4.413 0.616 70.5
800PJ350-97 1.671 17.065 4.266 3.195 2.782 1.29 16.927 3.711 111.11 107.52 10,885 6,032 5.762 36.082 -2.717 1.64 4.388 0.617 70.7
800PJ350-118 2.029 20.553 5.138 3.183 3.341 1.283 20.553 4.87 145.82 140.85 16,235 7,312 10.398 43.367 -2.705 1.633 4.37 0.617 70.9
1000PJ250-431 0.75 10.814 2.163 3.798 0.611 0.903 10.814 1.532 45.86 40.54 842 842 0.508 12.166 -1.696 1.072 4.257 0.841 51.5
1000PJ250-54 0.939 13.49 2.698 3.791 0.76 0.9 13.49 2.106 63.06 56.25 1,668 1,668 1.002 15.121 -1.69 1.068 4.247 0.842 51.4
1000PJ250-68 1.179 16.864 3.373 3.782 0.945 0.895 16.864 3.055 91.46 78.17 3,344 3,344 1.998 18.812 -1.682 1.064 4.235 0.842 51.3
1000PJ250-973 1.671 23.674 4.735 3.764 1.312 0.886 23.674 4.649 155.43 138.05 9,766 7,190 5.762 26.138 -1.666 1.055 4.21 0.843 51.2
1000PJ250-1183 2.029 28.529 5.706 3.75 1.568 0.879 28.529 5.706 194.34 183.17 16,235 9,733 10.398 31.25 -1.653 1.048 4.192 0.844 51.1
1000PJ350-68 1.321 20.378 4.076 3.927 2.14 1.273 19.895 3.095 92.66 83.08 3,344 3,344 2.239 41.705 -2.513 1.545 4.833 0.73 69.9
1000PJ350-97 1.875 28.656 5.731 3.91 2.993 1.263 28.567 5.03 150.59 138.04 9,766 7,190 6.463 58.323 -2.497 1.536 4.808 0.73 69.9
1000PJ350-118 2.277 34.576 6.915 3.897 3.595 1.257 34.576 6.57 196.71 182.15 16,235 9,733 11.669 70.072 -2.485 1.53 4.79 0.731 69.9
1200PJ250-541 1.052 20.909 3.485 4.459 0.799 0.871 19.92 2.417 72.37 67.25 1,382 1,382 1.123 22.624 -1.55 0.995 4.8 0.896 50.6
1200PJ250-68 1.321 26.162 4.36 4.449 0.993 0.867 25.4 3.342 100.05 94.15 2,770 2,770 2.239 28.143 -1.542 0.991 4.788 0.896 50.5
1200PJ250-97 1.875 36.799 6.133 4.43 1.379 0.858 36.661 5.692 170.41 156.46 8,080 7,420 6.463 39.093 -1.526 0.981 4.764 0.897 50.3
1200PJ250-118 2.277 44.407 7.401 4.416 1.649 0.851 44.407 7.192 215.32 206.07 14,774 11,060 11.669 46.73 -1.514 0.974 4.746 0.898 50.2
1200PJ350-68 1.464 31.235 5.206 4.619 2.261 1.243 30.647 3.689 110.45 100.55 2,770 2,770 2.481 62.405 -2.33 1.456 5.32 0.808 69.3
1200PJ350-97 2.078 43.997 7.333 4.601 3.162 1.234 43.997 6.488 194.25 168.62 8,080 7,420 7.165 87.257 -2.314 1.447 5.296 0.809 69.2
1200PJ350-118 2.525 53.152 8.859 4.588 3.799 1.227 53.152 8.439 252.66 223.92 14,774 11,060 12.94 104.824 -2.301 1.44 5.278 0.81 69.1
1400PJ250-541 1.165 30.431 4.347 5.111 0.83 0.844 28.394 2.847 85.24 77.15 1,180 1,180 1.244 31.939 -1.433 0.932 5.375 0.929 49.9
1400PJ250-68 1.464 38.104 5.443 5.102 1.032 0.84 36.334 3.948 118.21 108.77 2,364 2,364 2.481 39.728 -1.425 0.928 5.363 0.929 49.7
1400PJ250-97 2.078 53.672 7.667 5.082 1.434 0.831 52.784 6.793 203.38 183.22 6,891 6,891 7.165 55.181 -1.41 0.918 5.339 0.93 49.5
1400PJ250-118 2.525 64.839 9.263 5.068 1.714 0.824 64.835 8.651 259.03 243.57 12,592 11,304 12.94 65.96 -1.398 0.912 5.321 0.931 49.3
1400PJ350-68 1.607 45.02 6.431 5.293 2.36 1.212 44.368 4.287 128.34 117.37 2,364 2,364 2.723 88.183 -2.174 1.378 5.85 0.862 68.7
1400PJ350-97 2.282 63.495 9.071 5.275 3.301 1.203 63.495 7.93 237.41 198.55 6,891 6,891 7.866 123.298 -2.158 1.369 5.825 0.863 68.5
1400PJ350-118 2.773 76.777 10.968 5.262 3.967 1.196 76.777 10.475 313.63 265.25 12,592 11,304 14.211 148.12 -2.146 1.362 5.807 0.863 68.4
1600PJ250-681 1.607 52.973 6.622 5.742 1.065 0.814 49.61 4.553 136.33 121.82 2,062 2,062 2.723 53.658 -1.326 0.873 5.949 0.95 49
1600PJ250-97 2.282 74.702 9.338 5.722 1.478 0.805 72.453 7.893 236.32 207.81 6,007 6,007 7.866 74.527 -1.311 0.864 5.925 0.951 48.7
1600PJ250-118 2.773 90.321 11.29 5.707 1.767 0.798 89.314 10.113 302.79 278.66 10,972 10,972 14.211 89.083 -1.3 0.857 5.908 0.952 48.4

Notes:

1 Web-height-to-thickness ratio exceeds 200. Web stiffeners are required at all support points and concentric loads. Suitability of web holes must be evaluated independently.
2 When web-height-to thickness ratio exceeds 260, or flange-width-to-thickness ratio exceeds 60, effective properties are not calculated (limitations in AISI Section B1).
3 Allowable moment includes cold-work of forming.

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