...

Load and Deflection Data

The deformation of a material is usually expressed in terms of its deflection from its original unloaded position. The deflection is measured from the original neutral surface of the material to the neutral surface of the deformed material. The configuration assumed by the deformed neutral surface is known as the elastic curve of the material.

Publication of material herein is not to be construed as a warranty on the part of King Plastic Corporation, that these data and suggested practices are suitable for any general or particular use, or of freedom from infringement on any patent or patents. Further, any use of these data or suggested practices can only be made with the understanding that King Plastic Corporation makes no warranty of any kind respecting such use and the user assumes all liability arising therefrom.

Load (pounds)
Load (pounds)
 Center50100200500100015002000
King StarBoard® 1/4″8″.239″.389″.646″>1.00″   
King StarBoard® 1/4″16″.639″>1.00″     
King StarBoard® 1/4″24″>1.00″      
King StarBoard® 1/2″8″.054″.071″.116″.276″.580″.919″>1.00″
King StarBoard® 1/2″16″.094″.201″.389″.913″>1.00″  
King StarBoard® 1/2″24″.233″.471″.918″>1.00   
King StarBoard® 3/4″8″.015″.021″.036″.090″.183″.300″.540″
King StarBoard® 3/4″16″.037″.083″.149″.355″.783″>1.00 
King StarBoard® 3/4″24″.110″.203″.334″.754″>1.00″  
King StarBoard® 1“8″  .021″.044″.075″.112″.148″
King StarBoard® 1“16″ .081″.090″.183″.320″.471″.532″
King StarBoard® 1“24″.082″.118″.171″.340″.664″>1.00″ 
Load (pounds)
 Center50100200500100015002000
King StarBoard® ST 1/4″8″.147″.255″.436″.836″>1.00″  
King StarBoard® ST 1/4″16″.488″.744″>1.00    
King StarBoard® ST 1/4″24″>1.00″      
King StarBoard® ST 1/2″8″.047″.088″.092″.209″.459″.686″.907″
King StarBoard® ST 1/2″16″.085″.195″.359″.771″>1.00″  
King StarBoard® ST 1/2″24″.192″.384″.746″>1.00   
King StarBoard® ST 3/4″8″.040″.080″.089″.120″.173″.235″.319″
King StarBoard® ST 3/4″16″.025″.053″.091″.215″.434″.716″.962″
King StarBoard® ST 3/4″24″.100″.148″.339″.662″>1.00″  
King StarBoard® ST 1″8″  .056″.072″.98″.125″.161″
King StarBoard® ST 1″16″  .085″.181″.290″.393″.518″
King StarBoard® ST 1″24″.094″.142″.202″.348″.645″.931″>1.0
King StarBoard® ST 1-1/2″8″   .068″.090″.114″.152″
King StarBoard® ST 1-1/2″16″  .078″.143″.190″.228″.263″
King StarBoard® ST 1-1/2″24″.067″.111″.137″.198″.281″.373″.472″
Load (pounds)
 Center50100200500100015002000
King StarBoard® AS 1/2″8″.056″.100″.153″.334″.665″>1.00″ 
King StarBoard® AS 1/2″16″.154″.283″.518″>1.00″   
King StarBoard® AS 1/2″24″.301″.609″>1.00    
King StarBoard® AS 3/4″8″.042″.062″.072″.116″.199″.305″.549″
King StarBoard® AS 3/4″16″.100″.138″.206″.394″.798″>1.00″ 
King StarBoard® AS 3/4″24″.132″.220″.367″.878″>1.00″  
King StarBoard® AS 1″8″   .106″.148″.198″.254″
King StarBoard® AS 1″16″.070″.085″.119″.204″.387″.581″.821″
King StarBoard® AS 1″24″.077″.135″.186″.402″.821″>1.00″ 
Load (pounds/linear foot)
 Center50100200500100015002000
King StarBoard® 1/4″8″.071″.136″.286″.794″>1.00″  
King StarBoard® 1/4″16″.602″>1.00″     
King StarBoard® 1/4″24″>1.00″      
King StarBoard® 1/2″8″.059″.074″.095″.110″.210″.327″.463″
King StarBoard® 1/2″16″.157″.197″.331″.755″>1.00″  
King StarBoard® 1/2″24″.230″.456″.934″>1.00″   
King StarBoard® 3/4″8″ND.045″.058″.085″.117″.154″.188″
King StarBoard® 3/4″16″.026″.052″.098″.200″.430″.660″.880″
King StarBoard® 3/4″24″.107″.166″.325″.841″>1.00″  
King StarBoard® 1″8″NDND.013″.026″.080″.103″.124″
King StarBoard® 1″16″ND.044″.065″.117″.204″.295″.395″
King StarBoard® 1″24″.060″.079″.135″.289″.589″.914″>1.00″
King StarBoard® 1-1/2″8″NDNDND.010″.040″.080″.96″
King StarBoard® 1-1/2″16″NDND.049″.109″.199″.226″.262″
King StarBoard® 1-1/2″24″.052″.063″.091″.149″.215″.303″.399″
Load (pounds/linear foot)
 Center50100200500100015002000
King StarBoard® ST 1/4″8″.090″.138″.224″.571″>1.00″  
King StarBoard® ST 1/4″16″.350″.725″>1.00″    
King StarBoard® ST 1/4″24″>1.00″      
King StarBoard® ST 1/2″8″.057″.063″.080″.127″.208″.298″.414″
King StarBoard® ST 1/2″16″.089″.133″.257″.690″>1.00″  
King StarBoard® ST 1/2″24″.183″.364″>1.00″    
King StarBoard® ST 3/4″8″.039″.043″.045″.053″.072″.092″.110″
King StarBoard® ST 3/4″16″.048″.055″.092″.205″.405″.642″.852″
King StarBoard® ST 3/4″24″.071″.115″.213″.533″>1.00″  
King StarBoard® ST 1″8″ND.038″.039″.049″.064″.079″.092″
King StarBoard® ST 1″16″NDND.075″.139″.217″.304″.407″
King StarBoard® ST 1″24″.61″.080″.153″.301″.583″.942″>1.00
King StarBoard® ST 1-1/2″8″NDNDND.026″.035″.044″.049″
King StarBoard® ST 1-1/2″16″.053″.080″.140″.207″.290″.380″.470″
King StarBoard® ST 1-1/2″24″.053″.080″.140″.207″.290″.380″.470″
Load (pounds/linear foot)
 Center50100200500100015002000
King StarBoard® AS 1/2″8″.055″.076″.099″.142″.267″.440″.642″
King StarBoard® AS 1/2″16″.212″.283″.464″>1.00″   
King StarBoard® AS 1/2″24″.292″.605″>1.00″    
King StarBoard® AS 3/4″8″.040″.057″.064″.096″.121″.163″.202″
King StarBoard® AS 3/4″16″.073″.088″.140″.294″.619″.984″>1.00″
King StarBoard® AS 3/4″24″.125″.919″.345″.843″>1.00″  
King StarBoard® AS 1″8″ND.044″.058″.075″.091″.109″.148″
King StarBoard® AS 1″16″.048″.053″.080″.153″.293″.479″.725″
King StarBoard® AS 1″24″.081″.107″.172″.401″.825″>1.00″ 
Load (pounds/square foot)
 Center50100200500100015002000
King StarBoard® 1/4″8″.064″.087″.110″.161″.240″.310″.384″
King StarBoard® 1/4″16″.071″.097″.186″.196″.294″.371″.453″
King StarBoard® 1/4″24″.080″.107″.137″.218″.312″.440″.718″
King StarBoard® 1/2″8″.055″.062″.068″.082″.096″.110″.123″
King StarBoard® 1/2″16″.056″.067″.081″.096″.126″.158″.185″
King StarBoard® 1/2″24″.060″.074″.089″.116″.164″.203″.237″
King StarBoard® 3/4″8″.040″.052″.056″.065″.074″.083″.091″
King StarBoard® 3/4″16″.042″.062″.063″.080″.101″.118″.134″
King StarBoard® 3/4″24″.045″.067″.073″.104″.136″.163″.188″
King StarBoard® 1″8″ND.045″.052″.054″.062″.074″.080″
King StarBoard® 1″16″ND.055″.062″.072″.084″.099″.110″
King StarBoard® 1″24″.012″.059″.065″.098″.120″.138″.164″
King StarBoard® 1-1/2″8″NDND.044″.053″.059″.069″.079″
King StarBoard® 1-1/2″16″ND.042″.057″.067″.079″.094″.105″
King StarBoard® 1-1/2″24″.008″.055″.059″.092″.114″.129″.158″
Load (pounds/square foot)
 Center50100200500100015002000
King StarBoard® ST 1/4″8″.051″.066″.075″.110″.167″.224″.281″
King StarBoard® ST 1/4″16″.055″.088″.107″.171″.270″.345″.412″
King StarBoard® ST 1/4″24″.066″.097″.134″.226″.340″.519″.742″
King StarBoard® ST 1/2″8″.042″.056″.072″.083″.096″.107″.118″
King StarBoard® ST 1/2″16″.048″.069″.075″.094″.120″.144″.167″
King StarBoard® ST 1/2″24″.055″.070″.080″.115″.159″.191″.224″
King StarBoard® ST 3/4″8″.036″.048″.054″.060″.070″.077″.084″
King StarBoard® ST 3/4″16″.040″.054″.065″.074″.092″.107″.122″
King StarBoard® ST 3/4″24″.045″.059″.070″.100″.128″.154″.178″
King StarBoard® ST 1″8″NDND.047″.055″.062″.071″.077″
King StarBoard® ST 1″16″.017″.054″.057″.070″.081″.098″.106″
King StarBoard® ST 1″24″.029″.058″.063″.094″.117″.148″.174″
King StarBoard® ST 1-1/2″8″NDND.043″.051″.057″.066″.073″
King StarBoard® ST 1-1/2″16″.009″.045″.055″.069″.078″.091″.101″
King StarBoard® ST 1-1/2″24″.015″.047″.059″.087″.111″.139″.165″
Load (pounds/square foot)
 Center50100200500100015002000
King StarBoard® AS 1/2″8″.066″.071″.079″.099″.102″.121″.138″
King StarBoard® AS 1/2″16″.070″.075″.082″.106″.144″182″.210″
King StarBoard® AS 1/2″24″.074″.081″.095″.126″.178″.234″.278″
King StarBoard® AS 3/4″8″.044″.061″.066″.075″.086″.095″.105″
King StarBoard® AS 3/4″16″.051″.066″.071″.079″.098″.117″.127″
King StarBoard® AS 3/4″24″.059″.071″.079″.103″.131″.154″.181″
King StarBoard® AS 1″8″ND.048″.055″.059″.065″.079″.083″
King StarBoard® AS 1″16″.010″.058″.065″.071″.086″.099″.112″
King StarBoard® AS 1″24″.015″.062″.076″.098″.123″.149″.170″
Load (pounds)
 Center50100200500100015002000
King StarBoard® 1/4″8″.193″.335″.519″.895″>1.00″  
King StarBoard® 1/4″16″.370″.604″.984″>1.00″   
King StarBoard® 1/4″24″.851″>1.00     
King StarBoard® 1/2″8″.053″.062″.099″.233″.502″.757″.992″
King StarBoard® 1/2″16″.062″.135″.272″.676″>1.00″  
King StarBoard® 1/2″24″.195″.365″.742″>1.00″   
King StarBoard® 3/4″8″.033″.038″.054″.105″.199″.320″.467″
King StarBoard® 3/4″16″.050″.074″.124″.319″.578″>1.00″ 
King StarBoard® 3/4″24″.084″.143″.264″.710″>1.00″  
King StarBoard® 1″8″ND.036″.042″.059″.091″.126″.167″
King StarBoard® 1″16″.032″.049″.068″.123″.248″.393″.545″
King StarBoard® 1″24″.065″.085″.137″.310″.615″.956″>1.00″
King StarBoard® 1-1/2″8″NDNDND.051″.067″.079″.091″
King StarBoard® 1-1/2″16″ND.040″.048″.070″.100″.137″.177″
King StarBoard® 1-1/2″24″.053″.068″.082″.124″.209″.299″.422″
Load (pounds)
 Center50100200500100015002000
King StarBoard® ST 1/4″8″.114″.229″.375″.708″>1.00″  
King StarBoard® ST 1/4″16″.281″.506″.845″>1.00″   
King StarBoard® ST 1/4″24″.537″>1.00″     
King StarBoard® ST 1/2″8″.057″.069″.097″.194″.395″.610″.838″
King StarBoard® ST 1/2″16″.085″.167″.287″.623″>1.00″  
King StarBoard® ST 1/2″24″.149″.300″.564″>1.00″   
King StarBoard® ST 3/4″8″.020″.025″.031″.090″.145″.250″.355″
King StarBoard® ST 3/4″16″.048″.080″.112″.225″.449″.689″.927″
King StarBoard® ST 3/4″24″.062″.107″.196″.475″>1.00″  
King StarBoard® ST 1″8″NDND.025″.080″.110″.146″.180″
King StarBoard® ST 1″16″ND.068″.089″.145″.256″.379″.520″
King StarBoard® ST 1″24″.049″.100″.142″.273″.574″.789″>1.00″
King StarBoard® ST 1-1/2″8″NDNDND.033″.048″.057″.067″
King StarBoard® ST 1-1/2″16″ND.038″.052″.071″.102″.135″.171″
King StarBoard® ST 1-1/2″24″ND.082″.106″.165″.268″.367″.481″
Load (pounds)
 Center50100200500100015002000
King StarBoard® AS 1/2″8″.047″.064″.107″.278″.561″.809″>1.00″
King StarBoard® AS 1/2″16″.098″.200″.403″.834″>1.00″  
King StarBoard® AS 1/2″24″.260″.492″.936″>1.00″   
King StarBoard® AS 3/4″8″.038″.042″.053″.090″.177″.273″.339″
King StarBoard® AS 3/4″16″.069″.102″.154″.333″.642″.929″>1.00″
King StarBoard® AS 3/4″24″.080″.127″.265″.695″>1.00″  
King StarBoard® AS 1″8″NDNDND.085″.128″.179″.245″
King StarBoard® AS 1″16″.050″.060″.085″.163″.220″.398″.586″
King StarBoard® AS 1″24″.059″.107″.155″.399″.821″>1.00″ 
Load (pounds/linear foot)
 Center50100200500100015002000
King StarBoard® 1/4″8″.052″.061″.127″.359″.758″>1.00″ 
King StarBoard® 1/4″16″.183″.373″.785″>1.00″   
King StarBoard® 1/4″24″.576″>1.00″     
King StarBoard® 1/2″8″.045″.055″.072″.089″.142″.233″.339″
King StarBoard® 1/2″16″.050″.064″.119″.371″.870″>1.00″ 
King StarBoard® 1/2″24″.096″.206″.460″>1.00″   
King StarBoard® 3/4″8″.034″.039″.044″.066″.095″.126″.165″
King StarBoard® 3/4″16″.018″.029″.048″.125″.275″.475″.685″
King StarBoard® 3/4″24″.096″.130″.240″.685″>1.00″  
King StarBoard® 1″8″NDND.041″.050″.061″.072″.084″
King StarBoard® 1″16″NDND.039″.089″.162″.245″.351″
King StarBoard® 1″24″.060″.068″.106″.225″.470″.730″>1.00″
King StarBoard® 1-1/2″8″NDND.038″.041″.047″.056″.061″
King StarBoard® 1-1/2″16″NDND.035″.067″.090″.114″.138″
King StarBoard® 1-1/2″24″.042″.043″.065″.106″.173″.246″.321″
Load (pounds/linear foot)
 Center50100200500100015002000
King StarBoard® ST 1/4″8″.053″.063″.106″.268″.609″.920″>1.00″
King StarBoard® ST 1/4″16″.135″.243″.556″>1.00″   
King StarBoard® ST 1/4″24″.481″>1.00″     
King StarBoard® ST 1/2″8″.040″.048″.055″.073″.128″.192″.268″
King StarBoard® ST 1/2″16″.054″.065″.122″.359″.825″>1.00″ 
King StarBoard® ST 1/2″24″.090″.164″.368″>1.00″   
King StarBoard® ST 3/4″8″.035″.041″.049″.053″.068″.091″.110″
King StarBoard® ST 3/4″16″ND.040″.059″.134″.281″.476″.635″
King StarBoard® ST 3/4″24″.053″.065″.139″.400″>1.00″  
King StarBoard® ST 1″8″.031″.035″.041″.045″.054″.064″.077″
King StarBoard® ST 1″16″ND.039″.051″.091″.159″.226″.307″
King StarBoard® ST 1″24″.045″.062″.137″.262″.504″.658″>1.00″
King StarBoard® ST 1-1/2″8″NDND.025″.030″.041″.048″.052″
King StarBoard® ST 1-1/2″16″ND.037″.047″.067″.093″.121″.146″
King StarBoard® ST 1-1/2″24″.037″.057″.103″.137″.209″.286″.373″
Load (pounds/linear foot)
 Center50100200500100015002000
King StarBoard® AS 1/2″8″.046″.057″.075″.098″.194″.301″.424″
King StarBoard® AS 1/2″16″.059″.077″.160″.476″>1.00″  
King StarBoard® AS 1/2″24″.115″.221″.585″>1.00″   
King StarBoard® AS 3/4″8″.040″.042″.048″.071″.102″.135″.176″
King StarBoard® AS 3/4″16″.049″.051″.090″.223″.470″.737″>1.00″
King StarBoard® AS 3/4″24″.065″.094″.266″.674″>1.00″  
King StarBoard® AS 1″8″NDND.031″.068″.083″.097″.116″
King StarBoard® AS 1″16″ND.040″.059″.126″.245″.397″.542″
King StarBoard® AS 1″24″.049″.067″.145″.352″.734″>1.00″ 
Load (pounds/square foot)
 Center50100200500100015002000
King StarBoard® 1/4″8″.041″.059″.069″.088″.122″.160″.195″
King StarBoard® 1/4″16″.044″.061″.072″.105″.157″.201″235″
King StarBoard® 1/4″24″.051″.073″.085″.112″.175″.219″.272″
King StarBoard® 1/2″8″.038″.055″.063″.077″.096″.105″.116″
King StarBoard® 1/2″16″.040″.059″.071″.086″.101″.108″.129″
King StarBoard® 1/2″24″.049″.067″.080″.095″.132″.165″.195′
King StarBoard® 3/4″8″.036″.049″.050″.059″.072″.081″.087″
King StarBoard® 3/4″16″.040″.052″.059″.071″.083″.098″.110″
King StarBoard® 3/4″24″.046″.058″.066″.084″.111″.138″.163″
King StarBoard® 1″8″ND.037″.046″.052″.060″.076″.081″
King StarBoard® 1″16″ND.040″.050″.057″.067″.083″.092″
King StarBoard® 1″24″ND.049″.052″.079″.106″.126″.148″
King StarBoard® 1-1/2″8″NDND.037″.049″.052″.061″.073″
King StarBoard® 1-1/2″16″ND.027″.043″.057″.065″.078″.085″
King StarBoard® 1-1/2″24″ND.036″.046″.071″.100″.119″.136″
Load (pounds/square foot)
 Center50100200500100015002000
King StarBoard® ST 1/4″8.042″.058″.067″.085″.118″.155″.186″
King StarBoard® ST 1/4″16.049″.060″.072″.088″.123″159″.196″
King StarBoard® ST 1/4″24.055″.080″.085″.127″.185″.229″.281″
King StarBoard® ST 1/2″8.036″.052″.059″.071″.092″.099″.110″
King StarBoard® ST 1/2″16.040″.055″.062″.078″.098″.105″.114″
King StarBoard® ST 1/2″24.049″.061″.064″.093″.124″.152″.183″
King StarBoard® ST 3/4″8.035″.052″.056″.061″.069″.077″.083″
King StarBoard® ST 3/4″16.041″.056″.060″.064″.081″.091″.106″
King StarBoard® ST 3/4″24.047″.060″.066″.082″.105″.129″.148″
King StarBoard® ST 1″8ND.045″.046″.053″.063″.070″.077″
King StarBoard® ST 1″16ND.048″.050″.057″.068″.081″.091″
King StarBoard® ST 1″24ND.049″.052″.076″.098″.111″.137″
King StarBoard® ST 1-1/2″8NDND.042″.050″.059″.064″.069″
King StarBoard® ST 1-1/2″16ND.034″.047″.055″.062″.075″.086″
King StarBoard® ST 1-1/2″24ND.045″.049″.071″.093″.107″.131″
Load (pounds/square foot)
 Center50100200500100015002000
King StarBoard® AS 1/2″8″.042″.056″.068″.080″.101″.111″.124″
King StarBoard® AS 1/2″16″.045″.058″.070″.085″.104″.118″.141″
King StarBoard® AS 1/2″24″.051″.074″.082″.102″.134″.171″.205″
King StarBoard® AS 3/4″8″.039″.054″.063″.073″.081″.089″.096″
King StarBoard® AS 3/4″16″.041″.058″.066″.079″.088″.095″.102″
King StarBoard® AS 3/4″24″.046″.070″.078″.101″.125″.150″.176″
King StarBoard® AS 1″8″ND.039″.048″.056″.066″.080″.086″
King StarBoard® AS 1″16″ND.041″.054″.061″.072″.089″.095″
King StarBoard® AS 1″24″ND.057″.065″.083″.114″.135″.155″
Scroll to Top