Triangle scale ruler Linex 318 with multiple scales 1:15, 1:20, 1:25, 1:50, 1:75, 1:100

Triangle scale ruler Linex 318 provides six common architectural and engineering scales: 1:15, 1:20, 1:25, 1:50, 1:75 and 1:100. The triangular profile offers stable placement on drawing surfaces and three distinct edges with printed graduations for accurate measurement and scaled drawing. The ruler is intended for tasks that require frequent scale changes, such as converting measurements between scales, marking dimensions on plans or verifying dimensions on-site.

Advantages

The triangular shape prevents rolling and allows quick switching between scales without moving the tool. Clear, contrasting graduations reduce reading errors and support precise line work. The compact, multi-edge design combines six scales in a single instrument, eliminating the need to carry multiple rulers for different scales.

Suitable for

• Architects working with small-format and large-format plans
• Engineers performing scaled measurements and drawings
• Model makers and hobbyists creating scale models
• Construction professionals performing quick on-site checks

Key specifications

• Scales: 1:15, 1:20, 1:25, 1:50, 1:75, 1:100
• Profile: triangular for stability and three measuring edges
• Graduation type: printed linear graduations for scaled measurement
• Primary use: technical drawing, scale conversion, on-site dimension checking

How to use

Place the triangular ruler on the drawing surface with the edge corresponding to the required scale facing up. Align the zero mark with the point to be measured or drawn, then read the scaled value directly from the printed graduations. For drawing, use the ruler edge as a straight edge while marking or scribing lines with a pencil or technical pen. To convert between scales, read a measured distance on one edge and reproduce it using the graduations of the target scale. Store the ruler flat or on a drafting table ledge to keep graduations readable and edges straight.

Usage recommendations

Maintain the printed graduations by storing the ruler away from heavy abrasion and chemicals. Use a fine mechanical pencil or technical pen for precise lines, and check alignment visually before scribing. For repetitive on-site checks, verify zero alignment against a known reference to avoid cumulative error.