Dual laser measurement device and online ordering system using the same

A computer-implemented integrated system for construction product purchase, the system comprising:

• a mobile hand-held computing device;
• a dual laser measurement device (DLMD) coupled with the mobile hand-held computing device via a data interface;
• a DLMD software application (DLMD app) installed on the mobile hand-held computing device, the DLMD app including:
• a software routine to execute a function of a laser activation button to cause the DLMD to simultaneously cast laser beams in opposite directions to make multiple rapid sequential distance measurements between two points and calculate a final measurement based on the multiple rapid sequential distance measurements, wherein the simultaneously cast laser beams form a triangulation pyramid used to calculate a perpendicular distance between two surfaces;
• a product category selection interface to select a product category, based on the final measurements obtained using the cast laser beams, for a construction project;
• a product selection interface to select specific products, based on the final measurements obtained using the cast laser beams, for the construction project;
• and
• a product ordering interface to order the specific products, based on the final measurements obtained using the cast laser beams, from a supplier.