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Cee Joist Design

This document contains calculations for checking the deflection of C-joists under various loading conditions. It analyzes 4 different C-joist configurations of varying lengths and sizes. For each configuration, it calculates the total load, shear, moment, allowable deflection, actual deflection using a specified joist size and grade, and checks that the actual deflection is within the allowable limits.

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Rovin Rosario
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72 views6 pages

Cee Joist Design

This document contains calculations for checking the deflection of C-joists under various loading conditions. It analyzes 4 different C-joist configurations of varying lengths and sizes. For each configuration, it calculates the total load, shear, moment, allowable deflection, actual deflection using a specified joist size and grade, and checks that the actual deflection is within the allowable limits.

Uploaded by

Rovin Rosario
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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JOB NUMBER :

CUSTOMER :
DESIGN BY :
DATE : 09/01/23
DESCRIPTION : C-JOIST (TYPE 1)
DEFLECTION CHECK
REMARKS
B. JOIST
DEAD LOAD (psf) = 50.00
LIVE LOAD (psf) = 125.00
DL+LL TOTAL LOAD (psf) = 175.00
JOIST SPCAING (ft) = 2.00
LENGTH 1 (ft) = 13.00
((DL+LL) x JOIST SPA.x JOIST SPAN) /2000 SHEAR (k) = 2.275
((DL+LL) x JOIST SPA.x JOIST SPAN2) /8000 MOMENT (ft-k) = 7.394

B.1 USING CEE JOIST

CHECK DEFLECTION
L/240 TL ALLOW = 0.6500 in.
L/360 LL ALLOW = 0.4333 in.

8x25C12 Ixx = 12.6190 in4 E= 29500

Actual Deflection UC
Deflection = (5wL4) / (384EI) TL = 0.6042 in. 0.9295 OK
Deflection = (5wL4) / (384EI) LL = 0.4316 in. 0.9959 OK

MEMBER CHECK
JOB NUMBER :
CUSTOMER :
DESIGN BY : JLR
DATE : 09/01/23
DESCRIPTION : C-JOIST (TYPE 1)
DEFLECTION CHECK
REMARKS
B. JOIST
DEAD LOAD (psf) = 50.00
LIVE LOAD (psf) = 125.00
DL+LL TOTAL LOAD (psf) = 175.00
JOIST SPCAING (ft) = 2.00
LENGTH 1 (ft) = 12.50
((DL+LL) x JOIST SPA.x JOIST SPAN) /2000 SHEAR (k) = 2.188
((DL+LL) x JOIST SPA.x JOIST SPAN2) /8000 MOMENT (ft-k) = 6.836

B.1 USING CEE JOIST

CHECK DEFLECTION
L/240 TL ALLOW = 0.6250 in.
L/360 LL ALLOW = 0.4167 in.

8x35C14 Ixx = 11.6660 in4 E= 29500

Actual Deflection UC
Deflection = (5wL4) / (384EI) TL = 0.5587 in. 0.8939 OK
Deflection = (5wL4) / (384EI) LL = 0.3990 in. 0.9577 OK

MEMBER CHECK
JOB NUMBER : Q1-366
CUSTOMER :
DESIGN BY :
DATE : 09/01/23
DESCRIPTION : C-JOIST (TYPE 1)
DEFLECTION CHECK
REMARKS
B. JOIST
DEAD LOAD (psf) = 50.00
LIVE LOAD (psf) = 125.00
DL+LL TOTAL LOAD (psf) = 175.00
JOIST SPCAING (ft) = 2.00
LENGTH 1 (ft) = 18.00
((DL+LL) x JOIST SPA.x JOIST SPAN) /2000 SHEAR (k) = 3.150
((DL+LL) x JOIST SPA.x JOIST SPAN2) /8000 MOMENT (ft-k) = 14.175

B.1 USING CEE JOIST

CHECK DEFLECTION
L/240 TL ALLOW = 0.9000 in.
L/360 LL ALLOW = 0.6000 in.

12x35C12 Ixx = 40.4060 in4 E= 29500

Actual Deflection UC
Deflection = (5wL4) / (384EI) TL = 0.6935 in. 0.7706 OK
Deflection = (5wL4) / (384EI) LL = 0.4954 in. 0.8256 OK

MEMBER CHECK
JOB NUMBER :
CUSTOMER :
DESIGN BY :
DATE : 09/01/23
DESCRIPTION : C-JOIST (TYPE 1)
DEFLECTION CHECK
REMARKS
B. JOIST
DEAD LOAD (psf) = 50.00
LIVE LOAD (psf) = 125.00
DL+LL TOTAL LOAD (psf) = 175.00
JOIST SPCAING (ft) = 2.00
LENGTH 1 (ft) = 14.50
((DL+LL) x JOIST SPA.x JOIST SPAN) /2000 SHEAR (k) = 2.538
((DL+LL) x JOIST SPA.x JOIST SPAN2) /8000 MOMENT (ft-k) = 9.198

B.1 USING CEE JOIST

CHECK DEFLECTION
L/240 TL ALLOW = 0.7250 in.
L/360 LL ALLOW = 0.4833 in.

10x25C12 Ixx = 21.5410 in4 E= 29500

Actual Deflection UC
Deflection = (5wL4) / (384EI) TL = 0.5478 in. 0.7556 OK
Deflection = (5wL4) / (384EI) LL = 0.3913 in. 0.8096 OK

MEMBER CHECK
JOB NUMBER :
CUSTOMER :
DESIGN BY :
DATE : 09/01/23
DESCRIPTION : C-JOIST (TYPE 1)
DEFLECTION CHECK
REMARKS
B. JOIST
DEAD LOAD (psf) = 50.00
LIVE LOAD (psf) = 125.00
DL+LL TOTAL LOAD (psf) = 175.00
JOIST SPCAING (ft) = 2.00
LENGTH 1 (ft) = 15.50
((DL+LL) x JOIST SPA.x JOIST SPAN) /2000 SHEAR (k) = 2.713
((DL+LL) x JOIST SPA.x JOIST SPAN2) /8000 MOMENT (ft-k) = 10.511

B.1 USING CEE JOIST

CHECK DEFLECTION
L/240 TL ALLOW = 0.7750 in.
L/360 LL ALLOW = 0.5167 in.

10x25C12 Ixx = 21.5410 in4 E= 29500

Actual Deflection UC
Deflection = (5wL4) / (384EI) TL = 0.7153 in. 0.9230 OK
Deflection = (5wL4) / (384EI) LL = 0.5109 in. 0.9889 OK

MEMBER CHECK
JOB NUMBER : Q1-366
CUSTOMER : GRASS CREEK CONSTRUCTION
DESIGN BY : JLR
DATE : 09/01/23
DESCRIPTION : C-JOIST (TYPE 1)
DEFLECTION CHECK
REMARKS
B. JOIST
DEAD LOAD (psf) = 50.00
LIVE LOAD (psf) = 125.00
DL+LL TOTAL LOAD (psf) = 175.00
JOIST SPCAING (ft) = 2.00
LENGTH 1 (ft) = 13.50
((DL+LL) x JOIST SPA.x JOIST SPAN) /2000 SHEAR (k) = 2.363
((DL+LL) x JOIST SPA.x JOIST SPAN2) /8000 MOMENT (ft-k) = 7.973

B.1 USING CEE JOIST

CHECK DEFLECTION
L/240 TL ALLOW = 0.6750 in.
L/360 LL ALLOW = 0.4500 in.

10x25C14 Ixx = 16.0360 in4 E= 29500

Actual Deflection UC
Deflection = (5wL4) / (384EI) TL = 0.5529 in. 0.8192 OK
Deflection = (5wL4) / (384EI) LL = 0.3949 in. 0.8777 OK

MEMBER CHECK

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