Stringer

Abstract

A stringer for a modular scaffolding system. The stringer has a lower base, a web extending upwardly from the lower base, and a channel extending upwardly from the web, the channel having at its upper edge a pair of base flanges extending outwardly therefrom and having along a length of its inner wall a flange, wherein an insert shaped complementary to the channel and having a recess disposed along its length complementary to the flange is slidable into the channel.

1 . A stringer for a modular scaffolding system comprising:
 a lower base;   a web extending upwardly from the lower base; and   a channel extending upwardly from the web, the channel having at its upper edge a pair of base flanges extending outwardly therefrom and having within its inner wall an inner flange;   wherein an insert shaped complementary to the channel and having a recess disposed along its length complementary to the flange is slidable into the channel.   
     
     
         2 . The stringer of  claim 1 , wherein the inner flange extends along substantially the entire length of the channel. 
     
     
         3 . The stringer of  claim 1 , wherein a pair of inner flanges are provided, one of the inner flanges being provided at each of two inner walls of the channel. 
     
     
         4 . The stringer of  claim 3 , wherein the pair of inner flanges are mirror images of one another. 
     
     
         5 . The stringer of  claim 1 , wherein the stringer further comprises an aperture disposed through its sidewalls at one end of the channel. 
     
     
         6 . The stringer of  claim 5 , wherein the stringer further comprises a second aperture disposed through its sidewalls at the other end of the channel. 
     
     
         7 . The stringer of  claim 1 , wherein the inner flange is disposed to secure an insert within the channel, the insert having a recess formed therein complementary to the inner flange. 
     
     
         8 . The stringer of  claim 7 , wherein the insert is an extruded formwork. 
     
     
         9 . The stringer of  claim 7 , wherein the insert has a pair of recesses formed on opposing sides thereof. 
     
     
         10 . The stringer of  claim 7 , wherein the insert is formed at a length substantially the same as a length of the stringer. 
     
     
         11 . The stringer of  claim 7 , wherein the insert is formed at a length substantially the same as a distance between a pair of apertures formed at ends of the stringer. 
     
     
         12 . The stringer of  claim 7 , wherein the insert is formed from a plastic. 
     
     
         13 . The stringer of  claim 12 , wherein the insert is a high density plastic. 
     
     
         14 . The stringer of  claim 12 , wherein the insert is recyclable. 
     
     
         15 . The stringer of  claim 14 , wherein the insert is formed from recycled garbage bags.