Weight and heat, from the inputs only

Mass tools multiply a volume by a density you can see. Heat tools stop at sensible heat or steady conduction.

Logic

A steel plate at 7,850 kg/m³, 2 m by 1 m by 10 mm, is 157 kg. A 16 mm round bar is 1.578 kg/m, so 12 m is 18.94 kg. Concrete at 2,400 kg/m³, 0.5 m³, is 1,200 kg. A slab of 4.5 m by 2 m by 0.2 m is 1.800 m³ before that density is applied. Use plate weight, rebar weight, mass and concrete volume.

Free expansion is αLΔT. Steel at 12×10⁻⁶, 10 m, 40°C, moves 4.8 mm if nothing restrains it. Restraint would produce a force. That force is not calculated. Use thermal expansion.

Sensible heat is mcΔT. 50 kg of water, 4.186 kJ/kg·K, 20 K, is 4,186 kJ. Fabric loss is UAΔT. U 0.28, 40 m², 20 K, is 224 W. Neither includes ventilation or a change of phase. Use sensible heat and fabric heat loss.

Mass and heat screens

Plate mass is area times thickness times density. A 2 m by 1 m by 10 mm steel plate is 157 kg at 7,850 kg/m³. A 16 mm bar is about 1.578 kg/m. A volume of 0.5 m³ at 2,400 kg/m³ is 1,200 kg. Sensible heat is mass times specific heat times the change: 50 kg of water through 20 K is 4,186 kJ. Fabric loss is UAΔT: U 0.28, 40 m², 20 K is 224 W. Free thermal movement of 10 m of steel through 40 K is 4.8 mm.

Each figure is the quantity named. None is a specification, a mix, or a compliance check.

Last checked 3 October 2026. The logic is the textbook relationship named above. It is not a code check. See standards these tools do not replace.